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Title: The bombardier, and pocket gunner

Author: Ralph Willett Adye

Release date: March 29, 2024 [eBook #73283]

Language: English

Original publication: Charlestown: William Greenough, 1804

Other information and formats: www.gutenberg.org/ebooks/73283

Credits: Brian Coe and the Online Distributed Proofreading Team at https://www.pgdp.net (This file was produced from images generously made available by The Internet Archive)

*** START OF THE PROJECT GUTENBERG EBOOK THE BOMBARDIER, AND POCKET GUNNER ***

THE

BOMBARDIER,

AND

Pocket Gunner.

By

RALPH WILLETT ADYE,

CAPTAIN, ROYAL REGIMENT OF ARTILLERY.

First American, from the Second London Edition.

PRINTED FOR

E. LARKIN, No. 47, CORNHILL, BOSTON,

BY WILLIAM GREENOUGH,

CHARLESTOWN.

1804.

TO THE

Junior Officers

OF THE

Royal Regiment of Artillery:

WITH A HOPE OF ALSO

MEETING THE APPROBATION

OF THE

SENIOR OFFICERS OF THAT CORPS.

R. W. ADYE.

INDEX.

Page.

PREFACE,

i

AMMUNITION—For Small Arms—How carried,

7

—For Artillery, see Artillery.

AMMUZETTE—Its Length, Weight, &c.

8

APRONS of Lead—Weight and Dimensions of,

8

ARMS, Small—Their Weight and Dimensions,

Balls for their Proof, Service, &c.

ARTILLERY—1st. For the Field.

—Divided into Battalion Guns, Park and Horse Artillery,

10

—Ammunition and Stores for one Field Piece of each Nature,

11

—Manner of carrying the Ammunition and Stores,

15

—Load for a common Artillery Ammunition Waggon,

16

—Load for a Horse Artillery Ammunition Waggon,

17

—Proportion of Artillery, Ammunition, and Carriages

for four French Armies,

18

—Proportion of Ammunition carried with French Artillery,

and with that of other Powers,

20

—Movements and Positions of Battalion Guns,

21

—Movements and Positions of Artillery of the Park,

24

—Line of March for Three Brigades of Field Artillery,

28

—2d. Artillery and Ammunition for a Siege—

Considerations in estimating them,

29

—Proportion demanded for the Siege of Lisle,

31

—Arrangement and Position at a Siege,

33

—3d. Artillery and Ammunition for the Defence

of a Fortified Place—Manner of estimating them,

37

—Arrangement of the Artillery,

39

—Expenditure of Ammunition,

42

AXLETREES—Dimensions of, in Wood or Iron,

44

BALLS—of Lead—Manner of Packing them,

45

—Manner of finding their Diameters and Weights

BARRELS for Gunpowder; their Dimensions and Content

—Budge do.

46

BASKETS, Ballast—Dimensions of

46

BATTERIES—Dimensions of, for Guns, Mortars, and Howitzers

46

—For Ricochet firing,

48

—For the Defence of a Coast,

49

—Manner of estimating the Quantity of Materials for,

50

—Tools required for the Construction of

52

—Estimate of the Quantity of Earth which may be removed

in a given time,

53

BEDS—Dimensions and Weight of, for Mortars and Guns,

54

BOXES, for Ammunition—Dimensions and Weight of, when

filled and empty; and the Number of Rounds contained by

55

BOMB KETCH—Instruction for the Management of a, in Action,

56

—Proportion of Stores for,

58

BREACH—Manner of forming one; and Time required

to make it practicable,

60

BRIDGE—Manner of laying one, of Pontoons; Weight it will

bear; and Precautions required in passing over it,

62

CAMPS—Manner of laying out the front of,

for Infantry and Cavalry,

65

—Distribution of the Depth of,

66

—In a confined Situation,

69

CARCASSES—Composition for,

70

—Valencienne’s Composition, for making Shells

answer the Purpose of

—Dimensions and Weight of,

71

—Manner of preventing their being destroyed by the Explosion

CARRONADES—Dimensions and Weight of,

72

—Ranges with Shot and Shells from

CARRIAGES—Weight of, for Field Service,

73

—Dimensions of Axletrees for,

75

—Diameters of Wheels for,

76

—Dimensions and Weight of standing

77

CARTRIDGES—Weight and Dimensions of,

for Guns, Mortars, and Howitzers

78

—For Small Arms

79

—For Musquets by different Nations

79

CHAMBERS—Experiments upon the best Form of, for Mortars

80

CHARGES—For different Natures of Guns and Carronades

81

—Lessened when Cylinder Powder is used

81

—of French Guns

82

CHEVAUX DE FRIZE—Dimensions and Weight of

82

COMPOSITIONS—For Kitt; Fire, Smoke, and Light Balls;

suffocating Pots; Fire Hoops, Arrows, and

Lances; Cases for burning Fascine Batteries

84

—General Precautions in mixing

84

CONVOYS—Length of Line of March of

84

—Rate of travelling with, and Manner of escorting

85

DISPART—Of Guns

86

DISTANCES—Practical Methods of measuring without

mathematical Instruments

87

—Cavallo’s Micrometer for measuring

92

—Table of Angles subtended by one Foot at different

95

DRAG ROPES—Weight and Dimensions of

95

EMBARKATION—Of Ordnance and Stores

96

—Of Troops

99

EXERCISE—Of Artillery

—Duties of the Men attached to Field Guns or Howitzers,

with the full Complement, and with reduced Numbers

100

—Methods of advancing and retiring Field Artillery

without Drag Ropes

104

—Duties of the Men in advancing and retiring

Field Artillery with Drag Ropes

109

—Of Heavy Ordnance on a Battery with different

Complements of Men

112

—Of the Triangle Gin

115

—Of the Sling Cart

117

FASCINES—Dimensions and Uses of the different Natures of,

with the necessary Attentions in making them

119

FIRE SHIP—Proportion of combustible Stores for

120

—Method of fitting out

122

—New Method of fitting out, to produce more external Fire

124

FLINTS—Number of, packed in a half Barrel;

with the Weight of, &c.

126

FORTIFICATION—Practical Maxims in building Field Works

with their Dimensions

—Permanent; Observations upon the different Parts of,

with their principal Dimensions

131

—Observations upon the Means of adding to the Defence of Places

by Outworks, &c. and on defilading a Place from Heights

133

—Principal Dimensions of, according to Vauban

140

—Dimensions of Walls from 10 to 50 Feet high

142

FUZES—Composition for—Dimensions of

143

—Manner of finding the Length of, for any Range

144

GABIONS—Dimensions of, and Attentions in making them

145

GIN TRIANGLE—Dimensions and Weight of

146

GRAVITY—Table of specific Gravities

146

—Rules, to find the Magnitude of any Body from its Weight,

and the contrary

147

GRAPE SHOT—See Shot.

GRENADES—Distance to which they may be thrown

147

GUNNERY—In a nonresisting Medium

—How far it may be applied to Practice with the Help of good

Tables of Experiments

147

—Upon a horizontal Plane

148

—Upon inclined Planes

149

—Table of Amplitudes

151

—Table of Natural Sines, Tangents, and Secants

152

GUNS—Calibers of English and Foreign

153

—Length and Weight of English Brass

154

—Ditto French Brass

155

—Ditto English and French Iron

155

—Ranges with One Shot from Brass

156

—Ditto Two Shot

157

—Ditto small Charges from

157

—Effects of Case Shot from Battalion

158

—Ranges from Iron

159

—Ditto of 5½ Inch Shells from 24 Pr.

160

—Ditto 4⅖ Inch Ditto 12 Pr.

161

—Ranges from French

162

GUNPOWDER—Proportion of Ingredients for, by different

Powers in Europe

162

—Manner of Proving it at Pursleet

163

—Marks on the Barrels, by which the different Qualities

are distinguished

164

—French Proof of

165

HAIR CLOTH—Dimensions and Weight of

166

HAND BARROW—Ditto

166

HANDSPIKES—Ditto

166

HARNESS—Ditto for Horses and Men

166

HORSES—Military Gait, and other Particulars respecting them

166

—Manner of Regulating the Weight they ought to Draw

166

—Number of, allowed to Artillery Carriages

167

HOWITZERS—Dimensions and Weight of English and French

168

—Natures of and by different Powers

169

—Ranges from

170

LEVELLING—Table shewing the Difference between the true

and apparent Level

172

—Manner of applying this Table to finding Heights and Distances

172

LOAD—How regulated for Artillery Carriages

174

MAGAZINES—For Powder—Dimensions of Temporary ones

for Batteries

175

—Permanent, for fortified Places

175

MATCH, Slow—Composition for, and manner of making

—Time it will burn

177

—Quick—of Cotton or Worsted

178

MARCHING—Rate of, for Cavalry and Infantry

178

—Rates paid for pressed Carriages on a March

179

—Rates paid to Publicans for Troops on a March

179

MEASURES—Tables of English Weights and

180

—Old French, Do.

181

—New System of, by the French, with their proportion

to the old, and to the English

182

—Rules for converting French Weights and Measures into English

184

—German, and Weights

184

—Proportion between the English Foot, and Pound Avoir,

and those of the principal Places in Europe

185

—For Powder; their Dimensions

185

MECHANICS—The different Powers of, and the advantage

gained by each

186

MILE—Comparison between the Miles of different Countries

189

MINE—Rules for finding the proper Charge to produce

any required Excavation or Effect

190

—Remarks upon the Dimensions and Construction of Mines,

and their Galleries

193

—Usual System of Countermines, when prepared before hand

197

—Temporary Mines

198

MORTARS—Dimensions and Weight of English Brass and Iron

Mortars, with their extreme Ranges

200

—Ranges from 10 Inch Sea Service, at 21°

201

—Ditto 13 and 10 Inch Sea Service, at 45°

201

—Ditto French, at 45°

202

—Ditto English Land Service, at 45°

203

—Ditto of Iron

203

—Ditto English Land Service, at 45° of Brass

205

—Ditto Land Service, 5½ Inch Brass, at 15°

205

—Ditto Land Service, 10 and 8 Inch, at 10°

206

—Ditto Land Service, 10 and 8 Inch, at 15°

206

NAVY—Number and Nature of Ordnance for each Ship

in his Majesty’s

207

—Principal Dimensions of Ships Of War, Complements of Men,

and Draught of Water

208

ORDNANCE—Value of Brass and Iron

209

PACE—The Length of the Common and Geometrical

210

PARALLELS—See Trenches, and Sap

PAY—Table of, for the Officers, non Commissioned

Officers, and Privates of the Army

211

PARK—Its Situation and Distribution

213

PENDULUMS—How made for Artillery Purposes

215

—Proper Length of, for Seconds, ½ Seconds, and Quarters

215

—Rules for Finding the proper Length to make any number

of Vibrations in a Minute, and the Contrary

215

PETARDS—Dimensions of, and Stores for

216

PLATFORMS—Dimensions of, and Materials for Gun and Mortar

216

POINT BLANK—What

217

PONTOONS—Dimensions and Weight of, and Equipage for one

217

PORTFIRES—Composition for—Time they will Burn

—Manner of making them at Gibraltar

218

PROVISIONS—Regulations respecting Rations of,

for Sea and Land Service

219

PROOF of Iron Guns, with the Limits of their Reception

219

—Of Brass do.

220

—Howitzers, Mortars, and Carronades

221

—By Water

222

—By assaying the Metal

223

—Marks of condemned Ordnance

224

RATIONS—Of Provisions for Land and Sea Service

225

—Regulations respecting their Issue

226

—Deductions to be made from the Pay of Soldiers for

227

RANK—Between Sea and Land Officers

228

RECOIL—Of Brass Guns on Field Carriages, of Iron Guns

on Standing Carriages, and Mortars on their Beds

229

RECONNOITERING—Preparations for

230

Objects to be attended to in Reconnoitering—

1 Roads—2 Fords—3 Inundations—4 Springs

and Wells—5 Lakes and Marshes—6 Woods

and Forests—7 Heaths—8 Canals—9 Rivers—

10 Passes—11 Ravins—12 Cultivated Lands—

13 Orchards—14 Bridges—15 Mountains and

Hills—16 Coasts—17 Redoubts—18 Castles

and Citadels—19 Villages—20 Cities not fortified—

21 Fortified Towns—22 Positions

RICOCHET—Rules for firing

243

ROCKETS—Composition for Sky Rockets

245

—Table of General Dimensions of, with their Sticks

245

—Height to which they will ascend

246

ROPE—How distinguished—Rule for finding the Weight of

247

SAND BAGS—Dimensions of—Number required

248

SAP—Manner of carrying it on

248

SECANTS—Table of Natural Secants

248

SHELLS—Dimensions and Weight of, for Mortars and Howitzers

249

—For Guns and Carronades

250

—Manner of throwing Shells from Guns though they

do not fit the Bore

251

—French and German

251

—Rules to find the Weight of, and the Quantity of Powder

they will contain

252

SHOT—Rules to find the Number in any Pile of

252

—Rules for finding the Weight and Dimensions of

Iron and Lead Shot

253

—Table of Diameters of English and French Iron round Shot

255

—Table of English Case Shot for different Services

256

—Tables of Grape Shot for Sea and Land Service

257

—Manner of Quilting small Shells in Grape

257

—Precautions in firing Hot Shot

258

SINES—Table of Natural Sines

259

SOUND—Velocity of—Rules for computing Distances by

259

STOPPAGES—From the Pay of an Artillery Soldier, weekly

260

TANGENTS—Table of Natural Tangents

261

—Manner of making a Tangent Scale to any Piece of Ordnance

262

—Table of Tangents to 1° for English Field Artillery

262

—Ditto French

262

TENTS—Weight and Dimensions of Tents of different Descriptions

262

TONNAGE—Manner of finding the Tonnage of any Ship

263

—Table of Tonnage of Ordnance Stores

264

—Tonnage allowed for Officers Baggage on board Transports

266

TRANSPORTS—Regulations on board of

266

TRENCHES—Dimensions of Trenches of Approach at a Siege

266

—Manner of opening, and conducting the Trenches and Parallels

267

TROU DE LOUP—Dimensions of

269

TUBES—Dimensions of, and Composition for Tin Tubes

269

UNIFORMS—Principal Colours of the Military

Uniforms of different Powers in Europe

271

VELOCITY—Principal Points ascertained respecting the initial

Velocities of Shot from Guns of different Lengths, and

with different Charges, by the Experiments at Woolwich

272

—Initial Velocities of English and French Artillery

273

VENTS—Diameter of

275

WEIGHTS—Table of English and French

276

WINDAGE—Of English and French Artillery

276

WOOD—Employed in making Artillery Carriages

277

PREFACE.

A MAN must appear somewhat vain, who declares that he has been obliged to reject much useful information, for fear of increasing too much the size of his work: and yet manages to find room for a few pages of his own, by way of Preface: but lest the objects which the compiler of this little work has had in view should be mistaken, he finds it absolutely necessary to say a few words in explanation of them. This small collection of military memorandums was originally intended only for the compiler’s own pocket; to assist him in the execution of his duty: but it occurred to him, that many of his military friends stood in equal need of such an aid, and would willingly give a few shillings for what they would not be at the trouble of collecting. The compiler has seen young men, on their first entry into the regiment of artillery, give a guinea for manuscripts, which contained a very small part of the information offered in this little book. From a persuasion that a very principal part of its merit is derived from its portability, every endeavor has been used to press much into a little compass; and it is hoped, that this power has not been so far exerted, as to make the whole unintelligible: but, it must be understood, that the compiler does not propose to convey instruction to the untaught, but only to make a few memorandums of reference to facts; which those already versed in the military profession are supposed to have the knowledge to apply. The totally ignorant of these matters, he has, therefore, nothing to say to; they must consult more voluminous works. An alphabetical arrangement is merely adopted as the best calculated for this purpose; and as nothing like a military dictionary is intended, all terms are omitted, not within the compiler’s plan. All reference to plates has, likewise been avoided; as they not only very much increase the cost, but the bulk of a book. The principal difficulty which the compiler has had in making this little collection, has been to confine it within the limits of his original plan. The quantity of useful information which has pressed for admittance, has been with reluctance rejected. Such authors only have been quoted, as are generally esteemed the best; and every advantage has been taken of such information, as the compiler has been able to collect from experienced friends; but he has ventured to offer nothing whatever of his own. The French military authors have been principally consulted, on all subjects not immediately confined to our own system; and such notes as are given respecting their ordnance, may be of use in drawing a comparison with our own; and may serve as references to those in the habit of reading their military works. The compiler has not, in any instance, attempted to offer changes which he may have been led to imagine improvements; or to point out what he thinks deserve the title of defects in our own system; but he has given every information according to the present practice in our service. He cannot, however, help expressing a hope, that he will one day see his little book laid by as totally obsolete, and a better built upon a system less complicated, and more applicable to that particular nature of service which this country has in every war the greatest reason to expect.

Our armies will never, it is to be hoped, find a field of battle but on the other side of the water: they must therefore always be subject to the inconveniencies attendant upon the embarkation, and the confusion, too often the companion of a disembarkation of a quantity of ordnance and other military stores upon an enemy’s coast: how peculiarly necessary is it, therefore, that our military system should be the simplest and the best arranged. The French system of artillery was established as far back as the year 1765, and has been rigidly adhered to, through a convulsion in the country, which has overturned every thing else like order; and which even the government itself has not been able to withstand. We should therefore conclude that it has merit, and, though in an enemy, ought to avail ourselves of its advantages. At the formation of their system, they saw the necessity of the most exact correspondence in the most minute particulars; and so rigidly have they adhered to this principle, that though they have several arsenals, where carriages and other military machines are constructed; the different parts of a carriage may be collected from these several arsenals in the opposite extremities of the country, and will as well unite and form a carriage, as if they were all made and fitted in the same workshop. As long as every man who fancies that he has made an improvement is permitted to introduce it into our service, this cannot be the case with us.

Gunpowder has been so much improved of late years, under the direction of Col. Congreve, that the experiments made with the old powder are now of little service: only such tables of ranges with different natures of ordnance have therefore been inserted, as have been ascertained since the improved powder has been in use. As experiments are daily making at Woolwich and elsewhere, a blank leaf may be bound up after each nature of ordnance, in order to insert an abstract of them.

The compiler thinks it necessary to address himself to two classes of persons in particular; perhaps they may comprise the whole of his readers. First, those who think his little book might have been made much more complete. Second, those who think it improper that any information upon such matters should be offered to the public. To the first, he acknowledges the justice of the remark, but has to remind them, of the very great difficulties which they may themselves have experienced, in collecting information at Woolwich. To the second, he has but to remark, that he is well aware of the objections urged against publications which may give information as well to our enemies as our friends; but he does not imagine his little book to contain matter of sufficient consequence to do such mischief: and he is supported in an opinion by the most powerful and best organized military nations in Europe, that such secresy is the surest mark of ignorance.

The first edition being out of print, the compiler has endeavored to improve this, by every correction, and by some of the additions which his friends have been kind enough to suggest to him as necessary: but if he has neglected much of the valuable information offered him, it has not been from an insensibility of its merit, but from its entering more into the detail of matters than his little book would afford room to profit by; for it still professes not to instruct, but only to remind.

The compiler has added to this edition a short alphabetical index to the contents. This may appear to some superfluous, considering the alphabetical arrangement of the subjects: but it has been impossible to avoid a great deal of reference from one part of the work to another: beside, the compiler has observed in several of the copies in the possession of his friends, notes in manuscript, (entered on sheets bound up for the purpose) which are also to be found in the body of the work. This the compiler attributes to a cause which the index may probably remedy, by enabling the reader to know, at one view, the whole contents.

A MMUNITION—For small arms, in the British service, is generally packed in half barrels, each containing 1000 musquet, or 1500 carbine cartridges. An ammunition waggon will carry 20 of these barrels, and an ammunition cart 12 of them: their weight nearly 1 cwt. each.

The cartouch boxes of the infantry are made of so many different shapes and sizes, that it is impossible to say exactly what ammunition they will contain; but most of them can carry 60 rounds. See the word Cartridges; and for Artillery Ammunition, see the word Artillery, for the field, for the siege, and the defence of a fortified place.

The French pack all their ammunition in wagons without either boxes or barrels, by means of partitions of wood. Their 12 Pr. and 8 Pr. waggons will contain each 14,000 musquet cartridges, but their 4 Pr. waggons will contain only 12,000 each.

AMMUZETTE—See the word Guns.

APRONS—of lead for guns—

lbs.

oz.

Large—1 foot   long—

10 inches wide

8

4

weight.

Small—6 inches  ”  —

4½     ”   ”

1

12

”

ARMS—Small

Nature.

Length of

Barrel.

Diam. of

Bore.

Balls weight for

Proof.

Service.

Ft.

In.

Inches.

oz.

dr.

gr.

oz.

dr.

gr.

Wall pieces

4

6

.98

2

8

8

2

5

7

Musquet

3

6

.76

1

6

11½

1

1

12

Carbine

3

0

.61

0

14

13

0

12

11

Pistol, common

1

2

.58

0

8

15

0

7

4½

”  carbine

1

0

.66

0

14

13

0

12

11

ARTILLERY.—The proportion of artillery and ammunition necessary to accompany an army in the field, to lay siege to a fortified place, or to defend one, must depend upon so many circumstances, that it is almost impossible, in a small work of this kind, to lay down any satisfactory rules as guides on the subject: the following principles are, however, drawn from the best authorities:

1st. ARTILLERY for the Field.

Field Artillery is divided into Battalion Guns, Artillery of the Park, and Horse Artillery.

The Battalion Guns include all the light pieces attached to regiments of the line, which they accompany in all manœuvres, to cover and support them.

The following natures of field ordnance are attached to battalions of infantry, by different powers in Europe:

French

two

4

Prs.

per

battalion.

English

two

6

”

”

”

Danes

two

3

”

”

”

Austrians

three

6

”

”

”

Prussians

two

6

Prs. to a battalion in the first line.

”

two

3

Prs. to a battalion in the second line.

Hanoverians

two

3

Prs. per battalion.

The Artillery of the Park is composed of all natures of field ordnance. It is destined to form batteries of position; that is to say, to occupy advantageous situations, from which the greatest effect may be produced, in supporting the general movements of an army, without following it, like the battalion guns, through all the detail of its manœuvres. The park of artillery attached to an army in the field generally consists of twice as many pieces of different natures, varied according to the country in which it is to act, as there are battalions in the army. Gribauvale proposes the following proportion between the different natures of artillery for the park or reserve, viz. ⅖ of 12 Prs. ⅖ of 8 Prs. and ⅗ of 4 Prs. or reserve for battalion guns. In a difficult country he says, it may be ¼ of 12 Prs. ½ of 8 Prs. and ¼ of 4 Prs. and for every 100 pieces of cannon he allots 4 Howitzers; but this proportion of Howitzers is much smaller than what is generally given.

HORSE Artillery.—The French horse artillery consists of 8 Prs. and 6 inch Howitzers.

The English of light 12 Prs. light 6 Prs. and light 5½ inch Howitzers.

The Austrian and Prussian horse artillery have 6 Prs. and 5½ inch Howitzers.

AMMUNITION for Field Artillery.

A proportion of Ammunition and Stores for each Nature of Field Ordnance, viz. 1 Med. 12 Pr.[1]—1 heavy 6 Pr.—2 light 6 Prs. as they are always attached to Battalions of Infantry—and one 5½inch Howitzer; according to the British Service.

A = 12 Pounders, Medium.

B =  6 Pounders, Heavy.

C =  2 Light 6 Pounders,

D = 5½ Inch Howitzers.

Proportion of Ammunition

and Stores.

A

B

C

D

Shot fixed to wood bottoms—

case

24

30

68

24

”      ”  ” ”      ”

round

120

120

188

—

Shells

fixed

—

—

—

24

”

empty

—

—

—

120

Carcasses

fixed

—

—

—

4

Cartridges of

flannel filled

with powder.

4 lb.

120

—

—

—

3½ ”

24

—

—

—

2¼ ”

—

120

—

—

2  ”

—

30

—

—

1½ ”

—

—

188

—

1¼ ”

—

—

68

—

10 oz.

—

—

125

—

1  lb.

—

—

—

144

12 oz.

—

—

—

28

Cartridges, flannel, empty

12

12

100

12

Do. of paper for burst’g 10 oz

—

—

—

120

Tubes of tin—N. P.

172

178

560

190

Portfires—long small

18

18

62

18

Fuzes—drove

—

—

—

132

Powder, mealed   lbs.

—

—

—

½

Travelling carriages & limbers

1

1

2

1

Aprons of lead

1

1

2

1

Spunges, with staves and heads

2

2

4

2

Wad hooks, with staves

1

1

2

—

Handspikes—traversing

2

2

4

2

Tampions, with collars

1

1

2

1

Trucks—Hanoverian

—

1

2

1

Straps for lashing side arms

—

3

8

—

Tarpaulins—gun

1

1

2

1

”         limber

—

1

2

1

Linstocks, with cocks

1

1

2

1

Drag ropes, with pins—Prs.

2

2

4

2

Padlocks, with keys

2

3

5

4

Match—slow—lbs.

28

28

56

28

Spikes

Spring

1

1

2

1

Common

2

2

4

2

Punches for vents

2

2

4

2

Barrels budge

1

1

1

1

Couples for chain traces

—

6

12

6

Spare heads—spunge

1

1

2

1

”      ”  —rammer

1

1

2

1

Hammers, claw

1

1

2

1

Priming irons—sets

1

1

2

1

Draught chains—pairs

2

1

3

2

Powder horns—N. P.

—

1

—

—

Water buckets—French

1

1

2

1

Entrench’g tools—axes, felling

1

1

2

1

”          ”      ”  pick

1

1

2

1

”          ”       handbills

1

1

2

1

”          ”       spades

2

2

4

2

Marline, tarred—skeins

1

1

1

1

Twine,      ”   —do.

—

1

—

—

Hambro’ line  —do.

1

1

1

1

Packthread    —lbs.

—

1

—

—

Grease

firkins

1

1

1

1

”

boxes

3

2

3

3

Tallow

lbs.

1

1

2

1

Lanthorns, dark

1

1

1

1

Jacks,  lifting

1

1

1

1

”      handscrew

1

—

—

—

Waggons with hoops and painted covers,

Flanders pattern

2

1

1

2

Wad miltilts

2

1

1

2

Tanned hides

2

1

1

2

Men’s harness 12 to a set sets

1

1

—

—

Horse

Harness

New

pattern

Rope  (6 do.) sets

1

—

—

—

Chain (6 do.) sets

—

1

—

—

Trace (4 do.) sets

2

1

1

1

Common

pattern

Thill

—

—

2

—

Trace

—

—

4

—

Bit halters

—

—

6

—

Wanties

2

1

3

2

Hemp halters

14

10

10

12

Whips, long

—

—

2

—

” ,   short

7

5

2

6

Nose bags

14

10

10

12

Corn sacks

3

2

3

3

Forage cords, sets

3

2

3

3

Rope, tarred—2 inch, fathoms

—

—

10

—

For waggons

Linch pins

2

1

1

2

Clouts—body

4

2

2

4

”   —linch

4

2

2

4

Clout nails, 6d.

64

32

32

64

Spare ladle staves

1

1

1

1

Horses, for guns

6

6

6

4

” , for waggons

8

4

4

8

Drivers, for guns

3

3

2

2

”  , for waggons

4

2

1

4

Tube boxes, with straps

2

2

4

2

Portfire sticks

2

2

4

2

Cutting knives

1

1

2

1

Drawing do.

—

—

—

1

Scissars, pairs

1

1

2

1

Worsted, ounces

½

½

1

½

Needles, large

2

2

4

2

Cartouches of leather

2

2

4

2

Copper measures

for powder.

4 oz.

1

1

2

—

2  ”

—

1

—

—

1  ”

1

1

2

—

4 lbs. to  ¼ oz. sets

—

—

—

1

Thumb stalls

2

2

4

2

Perpendicular

—

—

—

1

Quadrant of brass

—

—

—

1

Diagonal scale

—

—

—

1

Copper salting box

—

—

—

1

Pincers for draw’g fuzes, pairs

—

—

—

1

Sheepskins

—

—

—

2

Funnels of copper

—

—

—

1

Compasses of steel, pairs

—

—

—

1

Saw, tenant

—

—

—

1

Files, square

—

—

—

3

Rasps, half round

—

—

—

2

Flax, oz.

—

—

—

8

Tow, oz.

—

—

—

4

Saw set

—

—

—

1

Mallets of wood

—

—

—

1

Setters do.

—

—

—

2

This proportion of ammunition and stores is carried in the following manner:

12 Pr.

MEDIUM,

Has no limber boxes,[2] but has two waggons attached to it,

and the ammunition and stores divided between them.

6 Pr.

HEAVY,

Carries 36 round, and 14 case shot in limber boxes, with a proportion

of the small stores; and the remainder is carried in one waggon.

6 Pr.

LIGHT,

Carries 34 round, and 16 case shot on the limber, with a proportion

of the small stores for immediate service; and, if acting separately,

of the small stores for immediate service; and, if acting separately,

must have a waggon attached to it, to carry the remainder. But two 6

pounders, attached to a battalion, have only one waggon between them.

5½ HOW’R

LIGHT,

Has 22 shells, 4 case shot, and two carcasses in the limber boxes, with

such of the small stores as are required for immediate service; and has

two waggons attached to carry the rest.

One common pattern ammunition waggon carries the following numbers of rounds of ammunition of each nature:

Nature.

No. of

Rounds

12  Prs. Medium.

72

6  Prs. Heavy.

120

6  Prs. Light.

156

3  Prs.

288

5½ How’r.

72

8 How’r.

24

Musquet.

20000[3]

The waggons, however, attached to the different parks of artillery in England, which have not been altered from the old establishment, are loaded with only the following number, and drawn by three horses:

Nature.

No. of

Rounds

12  Prs. Medium.

66

6  Prs. Heavy.

120

6  Prs. Light.

138

5½ How’r.

60

The horse artillery having waggons of a particular description, carry their ammunition as follows:

Shot.

Shells.

Carcasses.

Total No. with

each Piece.

Round.

Case.

12 Prs. light, on the limber

12

4

4

—

92

Do. ”   ” in one waggon

52

10

10

—

6 Prs. light, on the limber

32

8

—

—

150

Do.           in one waggon

97

13

—

—

5½ In.  How’r  on the limber

—

5

13

—

73

Do.           in one waggon

—

10

41

4

3 Prs. heavy, curricle

6

6

—

—

136

Do.      ammunition cart

100

24

—

—

The following Proportion of Artillery, Ammunition, and Carriages, necessary for four French Armies of different Degrees of Strength, and acting in very different Countries, is attributed to GRIBAUVALE, and is extracted from DURTUBIE, on Artillery.

ARMIES.

Flanders.

Moselle.

Rhine.

Italy.

Number of battalions

80

28

32

48

Battalion guns

160

56

64

94

Park or

Reserve

12 Prs.

32

12

12

16

8 Prs.

72

24

32

48

4 Prs.

40

16

16

24

6 Inch Howitzers

8

4

4

8

Total pieces of ordnance

312

112

128

192

Carriage for

the ordnance

including

spare ones

12 Prs.

36

14

14

18

8 Prs.

81

27

36

54

4 Prs.

215

78

90

129

6 Inch Howitzers

9

5

5

9

Total ordnance carriages

341

124

145

210

Ammunition

waggons

12 Prs.

96

36

36

48

8 Prs.

144

48

64

96

4 Prs.

200

72

80

120

6 Inch Howitzers

24

12

8

24

Waggons for musq. cartridges

120

42

48

72

Large Waggons for the park

10

6

5

8

Total ammunition waggons

594

216

241

368

Smiths forges

Large

14

3

3

8

Small

—

3

3

4

Total forges

14

6

6

12

Waggons

for

Intrenching

tools for

Artillery

27

10

12

16

The army

20

10

12

16

Carriages

for

New Iron

6

3

3

6

Wood for spr. carri’gs

9

3

3

7

Anchors, &c.

for pontoons

4

2

2

4

Total store carriages

66

28

32

49

Pontoons upon their carriages

36

18

18

36

Spare pontoon carriages

4

2

2

4

Total pontoon carriages

40

20

20

40

RECAPITULATION.

Ordnance——pieces

312

112

128

192

Carriages

Ammunition

594

216

241

368

Ordnance carriages

141

124

145

210

Store

66

28

32

49

Pontoon

40

20

20

40

Forges

14

6

6

12

General total of carriages

1055

394

144

679

This table contains, beside the proportion of ordnance with each army, also the quantity of ammunition with each piece of ordnance, and the number of rounds of musquet ammunition carried for the infantry; for each waggon in the French Service, having its particular allotment of ammunition and stores, it needs but to know the number of waggons of each description, to ascertain the quantity of ammunition and stores with an army. The following is the number of waggons usually attached to each piece of field ordnance in the French Service, and the quantity of ammunition carried with each.

Nature of Ordnance and

Number of waggons

attached to each.

Shot.

Total with

each piece.

Round.

Case.

12 Pr. on the carriage

9

—

213

3 Waggons—each containing

48

20

8 Pr. on the carriage

9

—

193

2 Waggons—each containing

62

30

4 Pr. on the carriage

18

—

168

One waggon—containing

100

50

6 Inch howitzer—on the carriage

—

4

160

3 Waggons—each containing

shell

3

49

The French horse artillery waggon, called the wurst, carries 57 rounds for 8 pounders; or 30 for 6 inch howitzers.

The following is a proportion of ammunition for one piece of field artillery of each nature, by different powers in Europe.

Nature.

Austrians

Prussians

Danes.

Hanoverians.

Case.

Round.

Case.

Round.

Case.

Round.

Case.

Round.

3 Pr.

40

184

20

90

58

177

50

150

6  ”

36

176

30

150

53

166

48

144

12  ”

44

94

20

130

44

128

50

150

Howitzer

16

90

20

60

25

76

30

120

Of the Movements and Positions of Field Artillery.

BATTALION Guns.—The following are the usual positions taken by battalion guns, in the most essential manœuvres of the battalion to which they are attached; but the established regulations for the movements of the infantry in the British Service, take so little notice of the relative situations for the artillery attached to it, that there is no authority for a guide on the subject. In review, both guns are to be placed, when, in line, on the right of the regiment; unlimbered and prepared for action. The guns 10 yards apart, and the left gun 10 yards from the right of the grenadiers. Nos. 7 and 8 dress in line with the front rank of the regiment. The officer, at open order, will be in front of the interval between his guns, and in line with the officers of the regiment. When the regiment breaks into column, the guns will be limbered up and wheel by pairs to the left: the men form the line of march, and the officer marches round in front of the guns. In the review of a single battalion, it is usual after marching round the second time, for one of the guns to go to the rear, and fall in at the rear of the column. Upon the regiment wheeling on the left into line, the guns, if separated, will be unlimbered to the right, but if they are both upon the right, they must be wheeled to the right, and then unlimbered; and afterwards run up by hand, as thereby they do not interfere with the just formation of the line, by obstructing the view of the pivots.

The usual method by which the guns take part in the firings while in line, is by two discharges from each piece, previous to the firing of the regiment; but this is usually regulated by the commanding officer, before the review. Though the guns when in line with a regiment in review, always remain in the intervals; in other situations of more consequence, every favorable spot which presents itself, from which the enemy can be more effectually annoyed, should be taken advantage of. In column, if advancing, the guns must be in front; if retreating, in the rear of the column. If in open column of more than one battalion, the guns in the center must be between the divisions, and when the column is closed, these guns must move to the outward flank of that division of the column, which leads the regiment to which they are attached. In changing front, or in forming the line from column, should the guns be on that flank of the battalion on which the new line is to be formed, they will commence firing to cover the formation.

In retiring by alternate wings or divisions, the guns must be always with that body nearest the enemy. That is, they will not retire with the first half, but will remain in their position till the second half retires; and will then only retire to the flanks of the first half; and when it retires again, the guns will retire likewise, but only as far as the second half, and so on.

When in hollow square, the guns will be placed at the weakest angles, and the limbers in the center of the square. In passing a bridge or defile in front, the guns will be the first to pass; unless from any particular position they can more effectually enfilade the defilé; and thereby better open the passage for the infantry. But in retiring through a defilé, the guns will remain to the last, to cover the retreat.

GENERAL RULE.—With very few variations, the guns should attend in all the movements of the battalion, that division of it, to which they are particularly attached; and every attention should be paid in thus adapting the movements of the guns to those of the regiment, that they be not entangled with the divisions of the line, and never so placed as to obstruct the view of the pivots, and thereby the just formation of the line; but should always seek those positions, from which the enemy can be most annoyed, and the troops to which they are attached, protected.

If at any time the battalion guns of several regiments should be united and formed into brigades, their movements will then be the same as those for the artillery of the park.

Artillery of the Park.

The artillery of the park is generally divided into brigades of 4 or 6 pieces, and a reserve, according to the force and extent of the front of an army. The reserve must be composed of about ⅙ of the park, and must be placed behind the first line. If the front of the army be extensive, the reserve must be divided.

The following are the principal rules for the movements and positions of the brigades of artillery: they are mostly translated from the Aide Memoire, a new military work.

In a defensive position, the guns of the largest caliber must be posted in those points, from whence the enemy can be discovered at the greatest distance, and from which may be seen the whole extent of his front.

In an offensive position, the weakest points of the line must be strengthened by the largest calibers; and the most distant from the enemy: those heights on which the army in advancing may rest its flanks, must be secured by them, and from which the enemy may be fired upon obliquely.

The guns should be placed as much as possible under cover; this is easily done upon heights, by keeping them so far back that the muzzles are only to be seen over them: by proper attention many situations may be found of which advantage may be taken for this purpose, such as banks, ditches, &c. every where to be met with.

A BATTERY in the field should never be discovered by the enemy till the very moment it is to open. The guns may be masked by being a little retired; or by being covered by troops, particularly cavalry.

To enable the commanding officer of artillery to choose the proper positions for his field batteries, he should of course be made acquainted, with the effect intended to be produced; with the troops that are to be supported; and with the points that are to be attacked; that he may place his artillery so as to support, but not incommode the infantry; nor take up such situations with his guns, as would be more advantageously occupied by the line. That he may not place his batteries too soon, nor too much exposed; that he may cover his front and his flanks, by taking advantage of the ground; and that he may not venture too far out of the protection of the troops, unless some very decided effect is to be obtained thereby.

The guns must be so placed as to produce a cross fire upon the position of the enemy, and upon all the ground which he must pass over in an attack.

They must be separated into many small batteries, to divide the fire of the enemy; while the fire from all these batteries, may at any time be united to produce a decided effect against any particular points.

These points are the débouchés of the enemy, the heads of their columns, and the weakest points in the front. In an attack of the enemy’s position, the cross fire of the guns must become direct, before it can impede the advance of the troops; and must annoy the enemy’s positions nearest to the point attacked, when it is no longer safe to continue the fire upon that point itself.

The shot from artillery should always take an enemy in the direction of its greatest dimension; it should therefore take a line obliquely or in flank, but a column in front.

The artillery should never be placed in such a situation, that it can be taken by an enemy’s battery obliquely, or in flank, or in the rear; unless a position under these circumstances, offers every prospect of producing a most decided effect, before the guns can be destroyed or placed hors de combat.

The most elevated positions are not the best for artillery, the greatest effects may be produced from a height of 30 or 40 yards at the distance of about 600 and about 16 yards of height to 200 of distance.

Positions in the rear of the line are bad for artillery, because they alarm the troops, and offer a double object to the fire of the enemy.

Positions which are not likely to be shifted; but from whence an effect may be produced during the whole of an action, are to be preferred; and in such positions a low breast work of 2 or 3 feet high may be thrown up, to cover the carriages.

Artillery should never fire against artillery, unless the enemy’s troops are covered, and his artillery exposed; or unless your troops suffer more from the fire of his guns, than his troops do from yours.

Never abandon your guns till the last extremity. The last discharges are the most destructive; they may perhaps be your salvation, and crown you with glory.

The parks of artillery in Great Britain are composed of the following ordnance; 4 medium 12 pounders; 4 desaguliers 6 pounders; and 4 light 5½ inch howitzers.

The following is the proposed line of march for the three Brigades when acting with different Columns of Troops, as settled, in 1798.

12 Pounders.

6 Pounders.

Howitzers.

4 Guns.

4 Guns.

4 Howitzers.

8 Ammunition Waggons.

4 Ammunition Waggons.

8 Ammunition Waggons.

1 Forge Cart.

1 Forge Cart.

1 Forge Cart.

1 Store Waggon,

1 Store Waggon.

1 Store Waggon.

with a small proportion of

stores and spare articles.

1 Spare Waggon.

1 Spare Waggon.

1 Spare Waggon.

1 Waggon to carry bread

1 Waggon for bread

1 Waggon with bread

and oats.

and oats.

and oats.

2 Waggons with musquet

2 Waggons with musquet

2 Waggons with musquet

ball cartridges.

ball cartridges.

ball cartridges.

18 Total

14 Total

18 Total

2d. Artillery and Ammunition for a Siege.

Necessary considerations in forming an estimate for this service.

The force, situation, and condition of the place to be besieged; whether it be susceptible of more than one attack; whether lines of circumvallation or countervallation will be necessary; whether it be situated upon a height, upon a rocky soil, upon good ground, or in a marsh; whether divided by a river, or in the neighborhood of one; whether the river will admit of forming inundations; its size and depth; whether the place be near a wood, and whether that wood can supply stuff for fascines, gabions, &c.; whether it be situated near any other place where a depot can be formed to supply stores for the siege. Each of these circumstances will make a very considerable difference in proportioning the stores, &c. for a siege. More artillery will be required for a place susceptible of two attacks, than for the place which only admits of one. For this last there must be fewer pieces of ordnance, but more ammunition for each piece. In case of lines being necessary, a great quantity of intrenching tools will be required, and a numerous field train of artillery. In case of being master of any garrison in the neighborhood of the besieged town, from whence supplies can readily be drawn, this must be regarded as a second park: and too great a quantity of stores need not be brought at once before the besieged place. The number of batteries to be opened before the place must determine the number of pieces of ordnance; and on the quantity of ordnance must depend the proportion of every species of stores for the service of the artillery.

There must be a battery to enfilade every face of the work to be besieged, that can in any way annoy the besiegers in their approaches. These batteries, at least that part of them to be allotted for guns, need not be much longer than the breadth of the rampart to be enfiladed, and will not therefore hold more than 5 or 6 heavy guns; which, with two more to enfilade the opposite branch of the covert way, will give the number of guns for each ricochet battery. As the breaching batteries, from their situation, effectually mask the fire of the first or ricochet batteries, the same artillery generally serves for both. Having thus ascertained the number of heavy guns, the rest of the ordnance will bear the following proportion to them:

- Mortars.—From 8 inch to 13 inch, about ⅓.

- Small Mortars.—About ¼.

- Heavy Howitzers.—About ⅛.

The fewer natures of ordnance which compose the demand the better, as a great deal of the confusion may be prevented, which arises from various natures of ammunition and stores being brought together.

The Carriages for the Ordnance are generally as follows:

- For 24 Prs. ⅚ the number of guns.

- For Mortars, ⁸/₉ the number of mortars.

- For Howitzers, ¾ the number of howitzers.

- For Stone Mortars, ⁶/₇ the number of mortars.

Ammunition for the Ordnance.

- 24 Prs.——At 1000 rounds per gun.

- Mortars, howitzers, and stone mortars,

- at 800 rounds per piece of ordnance.

- DURTUBIE.

The following proportion of artillery and ammunition was demanded by a very able officer, for the intended siege of Lisle, in 1794, which place was thought susceptible of two attacks.

- 64—24 Prs. with carriages complete, at 50 round shot per gun,

- per day, for the whole siege; half of them en ricochet,

- with 2lbs. of powder; the other half with the full charge

- of 8lbs.

- Case and Grape shot, at one round per gun, per day,

- of each: 6lbs. per charge.

- Shells for guns, two rounds do.

- Flannel cartridges, for the case, grape, and shells.

- Tin tubes for the case and grape.

- Quill tubes for the round shot.

- Spare, ⅒.

- 28—10 Inch mortars, on iron beds, at 50 shells each per day,

- for the whole siege. 3lbs. of powder charge—2lbs. 10 oz.

- for bursting.

- Pound shot—100 to a charge; 50 rounds per mortar each

- day for 10 mortars 7 days; 2 lbs. of powder each.

- Hand grenades—25 to a charge; the same as the pound shot.

- Carcasses, round—1 per mortar, per day.

- 8— 8 Inch howitzers, on travelling carriages

- 30 Shells for each per day, during the siege.

- Case shot—5 rounds per day each.

- Carcasses—1 per day each.

- Powder—1 lb. per charge; 1 lb. 14 oz. for bursting.

- 20—5½ Inch mortars, on wooden beds.

- 50 Shells for each, per day, for the whole siege;

- charge 8 oz.—12 oz. for bursting.

- Flannel cartridges, for ⅓ the number of rounds.

- Tin tubes in the same proportion.

- Portfires, ½ the number of rounds with tubes.

- Fuzes, ⅒ to spare.

- Match, 50 cwt.

- Spare carriages for 24 Prs. seven.

- 2  Devil carriages.

- 6 Sling carts.

- 6 Block carriages.

- 3 Forge carts.

- 3 Store waggons, with iron and coals.

- 3 Triangle gins, complete.

- 6 Laboratory tents.

- 2 Small petards.

- 4  Grates for heating shot.

Of the Arrangement of Artillery at a Siege.

The first arrangement of the artillery at a siege is to the different batteries raised near the first parallel, to enfilade the faces of the work on the front attacked, which fire on the approaches. If these first batteries be favorably situated, the artillery may be continued in them nearly the whole of the siege; and will save the erection of any other gun batteries, till the besiegers arrive on the crest of the glacis. It however frequently happens, from local circumstances, that the besiegers cannot avail themselves of the most advantageous situations for the first batteries. There are four situations from which the defences of any face may be destroyed; but not from all with equal facility. The best position for the first batteries, is perpendicular to the prolongation of the face of the work to be enfiladed. If this position cannot be attained, the next that presents itself is, on that side of the prolongation which takes the face in reverse; and under as small an angle as possible. From both these positions the guns must fire en ricochet. But if the ground, or other circumstance, will not admit of either of these being occupied by ricochet batteries, the battery to destroy the fire of a face must be without the prolongation, so as to fire obliquely upon the outside of the face. The last position, in point of advantage, is directly parallel to the face. From these two last positions the guns must fire with the full charges.

The second, or breaching batteries at a siege, are generally placed on the crest of the glacis, within 15 or 18 feet of the covert way; which space serves as the epaulment: but if the foot of the revetment cannot be seen from this situation, they must be placed in the covert way, within 15 feet of the counterscarpe of the ditch. These batteries must be sunk as low as the soles of the embrazures, and are in fact but an enlargement of the sap, run for the lodgement on the glacis or in the covert way. In constructing a battery on the crest of the glacis, attention must be paid that none of the embrazures open upon the traverses of the covert way. These batteries should consist of at least four guns; and if the breadth between the traverses will not admit of this number, at the usual distances, the guns must be closed to 15 or 12 feet from each other.

The mortars are generally at first arranged in battery, adjoining the first gun batteries, or upon the prolongation of the capitals of the works; in which place they are certainly least exposed. Upon the establishment of the half parallels, batteries of howitzers may be formed in their extremities, to enfilade the branches of the covert way; and upon the formation of the third parallel, batteries of howitzers and stone mortars may be formed to enfilade the flanks of the bastions, and annoy the besieged in the covert way. In the lodgement on the glacis, stone and other mortars may also be placed, to drive the besieged from their defences. A great object in the establishment of all these batteries, is to make such an arrangement of them, that they mask the fire of each other as little as possible; and particularly of the first, or ricochet batteries. This may very well be prevented till the establishment on the crest of the glacis, when it becomes in some degree unavoidable: however, even the operations on the glacis may be so arranged, that the ricochet batteries be not masked till the breaching batteries be in a great state of forwardness: a very secure method, and which prevents the soldiers in trenches being alarmed by the shot passing over their heads, is to raise a Parados, or parapet, in the rear of the trenches, at such parts where the fire from the besieger’s batteries crosses them. For further details on this subject, and for the manner of constructing batteries, see the word Battery; also the words Ricochet, Breach, Magazine, Platform, &c.

3d. Artillery and Ammunition for the

Defence of Fortified Place.

It is usual in an Estimate of Artillery and Ammunition for the Defence of Fortified Places, to divide them into Eight Classes, as follows:

CLASSES.

1

2

3

4

5

6

7

8

Garrisons

12000

10000

8000

5000

3500

2500

1600

400

Cannon

100

90

80

70

60

50

40

30

Triangle Gins

4

3

2

2

2

1

1

1

Sling Carts

4

3

2

2

2

1

1

1

Jacks of Sizes

4

3

2

2

2

1

1

1

Truck Carriages

6

6

4

4

2

2

2

2

Ammunition Carts, &c.

12

12

12

6

6

6

2

2

Tools for Pioneers

9000

6000

5000

4000

3500

3000

1000

1000

” ” Miners

300

200

100

100

100

100

50

5

Tools for   ⅓ Axes

1200

900

600

500

450

300

150

150

Cutting ⅔ Billhooks

Forges, complete

6

4

2

2

2

2

1

1

The guns will be of the following calibers: ⅓ of 18 Prs.—⅓ of 12 Prs.—and ⅓ of 24, 9, and 4 Pounders in equal proportions. If the place does not possess any very extraordinary means of defence, it will be very respectably supplied with 800 rounds of ammunition per gun for the two larger calibers, and 900 for each of the others.

Gun Carriages—⅓ more than the number of guns.

Mortars—About ¼ the number of guns in the three first classes; and ⅕ or ⅙ in the other classes. Of these ⅖ will be 13 or 10 inch mortars, and the rest of a smaller nature.

Howitzers—¼ the number of mortars.

Stone Mortars—⅒ the number of guns.

Shells—400 for each of the 10 and 13 inch mortars, and 600 for each of the smaller ones.

Beds for mortars—⅓ to spare.

Carriages for howitzers—⅓ to spare.

Hand Grenades—4 or 5000 for the two first classes; 2000 in the three following classes; and from 1500 to 600 in the three last classes.

Rampart Grenades—2000 for the first class; 1000 for the four following classes; and 500 for the sixth class; none for the two last.

Fuzes—¼ more than the number of shells.

Bottoms of wood for stone mortars—400 per mortar.

Sand Bags—500 for every piece of ordnance in the large places, and ¼ less in the small ones.

Handspikes—10 per piece.

Tackle Falls for gins—1 for every 10 pieces to spare.

Musquets—1 per soldier, and the same number to spare.

Pistols, pairs—½ the number of musquets.

Flints—50 per musquet, and 10 per pistol.

Lead or Balls for small arms—30 pounds per musquet.

Powder for Small Arms—5 pounds for every musquet in the garrison, including the spare ones.

The above proportions are taken from Durtubie’s Manuel De l’Artilleur.

The following method of regulating the management of the artillery, and estimating the probable expenditure of ammunition in the defence of a fortified place, is extracted from a valuable work on fortification lately published at Berlin. It is particularly applied to a regular hexagon; the siege is divided into three periods, viz.

1st. From the first investiture to the first opening of the trenches, about 5 days.

2d. From the opening of the trenches to the effecting a lodgement on the glacis, about 18 days.

3d. From this time to the capitulation, about 5 days.

First Period. Three guns on the barbette of each bastion and on the barbettes of the ravelins in front of the gateways, half 24 Prs. and half 18 Prs.[4] three 9 Prs. on the barbette of each of the other ravelins.

Twelve 12 Prs. and twelve 4 Prs. in reserve.

One 13 inch mortar in each bastion.

Six of 8 inch in the salient angles of the covert way.

Do. in reserve.

Ten stone mortars.

The 12 Prs. in reserve, are to be ranged behind the curtain, on whichever side they may be required, and the 4 Prs. in the outworks; all to fire en ricochet over the parapet. By this arrangement, the whole of the barbette guns are ready to act in any direction, till the side of attack is determined on; and with the addition of the reserve, 49 pieces may be opened upon the enemy the very first night they begin to work upon the trenches.

The day succeeding the night on which the trenches are opened, and the side to be attacked determined, a new arrangement of the artillery must take place. All the 24 and 18 Prs. must be removed to the front attacked, and the other bastions, if required, supplied with 12 Prs. The barbettes of the bastions on this front may have each 5 guns, and the 12 18 prs. may be ranged behind the curtain. The six mortars in reserve must be placed, two in each of the salient angles of the covert way of this front, and with those already there, mounted as howitzers,[5] to fire down the prolongations of the capitals. Three 4 pounders in each of the salient places of arms of the ravelins on the attacked fronts, to fire over the palisading, and five 9 Prs. in the ravelin of this front. This arrangement will bring 47 guns, and 18 mortars to fire on the approaches after the first night; and with a few variations will be the disposition of the artillery for the second period of the siege. As soon as the enemy’s batteries are fairly established, it will be no longer safe to continue the guns en barbette, but embrazures[6] must be opened for them; which, embrazures must be occasionally masked, and the guns assume new directions, as the enemy’s fire grows destructive; but may again be taken advantage of, as circumstances offer. As the enemy gets near the third parallel, the artillery must be withdrawn from the covert way to the ravelins, or to the ditch, if dry, or other favorable situations; and, by degrees, as the enemy advances, to the body of the place. During this period of the siege, the embrazures must be prepared in the flanks, in the curtain which joins them, and in the faces of the bastions which flank the ditch of the front ravelins. These embrazures must be all ready to open, and the heavy artillery mounted in them, the moment the enemy attempts a lodgement on the glacis.

Every effort should be made to take advantage of this favorable moment, when the enemy, by their own works, must mask their former batteries, and before they are able to open their new ones.

The expenditure of ammunition will be nearly as follows:

First period of the siege—5 rounds per gun, per day, with only half the full charge, or ⅙ the weight of the shot, and for only such guns as can act.

Second period—20 rounds per gun, per day, with ⅙ the weight of the shot.

Third period—60 rounds per gun, per day, with the full charge, or ⅓ the weight of the shot.

Mortars—At 20 shells per day, from the first opening of the trenches to the capitulation.

Stone Mortars—80 rounds per mortar, for every 24 hours, from the establishment of the demi parallels to the capitulation; about 13 days.

Light, and Fire balls—Five every night, for each mortar, from the opening of the trenches to the eighth day, and three from that time to the end

These amount to about

700 for guns.

400 for mortars.

1000 for stone do.

This proportion and arrangement is however made upon a supposition, that the place has no countermines to retard the progress of the besiegers, to a period beyond what is abovementioned; but the same author estimates, that a similar place, with the covert way properly countermined beforehand, and those countermines properly disputed, may retard a siege at least 2 months; and that if the other works be likewise effectually countermined and defended, the siege may be still prolonged another month.

The above proportion is therefore to be further regulated, as the strength of the place is increased by these or any other means. These considerations should likewise be attended to, in the formation of an estimate of ammunition and stores for the siege of a fortified place. See Carriage, Platform, Park, and the different natures of artillery, as Gun, Mortar, Howitzer, &c.

The small arms ammunition is estimated by this author as follows:

¼ of a pound of gunpowder, or 10 rounds per day, per man, for all the ordinary guards.

1¼ lbs. or 50 rounds per man, per 12 hours, for all extraordinary guards.

⅝ of a pound, or 25 rounds for every man on picket, during the period of his duty.

AXLETREES—See the word Carriages.

B ALLS—of lead, of different natures.

Nature.

Number to

one pound.

Diameter

in inches.

Number made from

one ton of Lead.

Wall pieces

6¾

.89

14,760

Musquets

14½

.68

32,480

Carbine

20

.60

44,800

Pistol

34

.51

78,048

7 Barrel guns

46½

.46

104,160

Lead balls are packed in boxes containing each 1 cwt. About 4 pounds of lead in the cwt. are generally lost in casting. See Shot.

BARRELS for powder—Their dimensions.

Whole

Barrels.

Half

Barrels.

Quarter

Barrels.

Ft.

In.

Ft.

In.

Ft.

In.

Depth

1

9.61

1

5.13

1

2.25

Diameter at top

1

3.61

1

0.37

9.35

”   at bulge

1

5.36

1

2.

10.71

”   at bottom

1

3.51

1

0.31

9.41

The whole barrels are made to contain 100 pounds, and the half barrels 50 pounds of powder; but of late only 90 pounds have been put into the barrels, and 45 into the half barrels; which, by leaving the powder room to be shifted, preserves it the better.

Budge Barrels contain 38 lbs.

Weight of barrel—

copper hooped—

10 lbs.

”         ”

hazle hooped—

6

Length of barrel

10½ inches.

Diameter

1 foot 1 inch.

BASKETS.—Ballast, ½ bushel—weight, 5 lbs. Diameter, 1 foot 6 inches—length, 1 foot.

BATTERY.—Dimensions of Batteries.

1. Gun Batteries.—Gun Batteries are usually 18 feet per gun. Their principal dimensions are as follow:

- Ditch.—Breadth          12 feet.

- Depth              8

Note. These dimensions give for a battery of two guns 3456 cubic feet of earth; and must be varied according to the quantity required for the epaulment.

Epaulment.—

Breadth

at bottom

23

feet.

”

at top

18

Height

within

7

”

without

6

ft. 4 in.

Slope,

interior

²/₇

of height.

”

exterior

½

of height.

Note. The above breadths at top and bottom are for the worst soil; good earth will not require a base of more than 20 feet wide, which will reduce the breadth at top to 15 feet; an epaulment of these dimensions for two guns will require about 4200 cubic feet of earth, and deducting 300 cubic feet for each embrazure, leaves 3600 required for the epaulment. In confined situations the breadth of the epaulment may be only 12 feet.

Embrazures.—

Distance

between their centers

18

feet.

Openings,

interior

20

inches.

”

exterior

9

feet.

Height of the sole above the platform

32

inches.

Note. Where the epaulment is made of a reduced breadth, the openings of the embrazures are made with the usual breadth within, but the exterior openings proportionally less. The embrazures are sometimes only 12 feet asunder, or even less when the ground is very confined. The superior slope of the epaulment need be very little, where it is not to be defended by small arms. The slope of the sole of the embrazures must depend upon the height of the object to be fired at. The Berm is usually made 3 feet wide, and where the soil is loose, this breadth is increased to 4 feet.

2. Howitzer Batteries.—The dimensions of howitzer batteries are the same as those for guns, except that the interior openings of the embrazures are 2 feet 6 inches, and the soles of the embrazures have a slope inwards of about 10 degrees.

3. Mortar Batteries—Are also made of the same dimensions as gun batteries, but an exact adherence to those dimensions is not so necessary. They have no embrazures. The mortars are commonly placed 15 feet from each other, and about 12 feet from the epaulment.

Note. Though it has been generally customary to fix mortars at 45°, and to place them at the distance of 12 feet from the epaulment, yet many advantages would often arise from firing them at lower angles; and which may be done by removing them to a greater distance from the epaulment, but where they would be in equal security. If the mortars were placed at the undermentioned distances from the epaulment, they might be fired at the angles corresponding:

At

13

feet distance

for firing at

30

degrees.

21

”

”

20

30

”

”

15

40

”

”

10

over an epaulment of 8 feet high.

A French author asserts, that all ricochet batteries, whether for howitzers or guns, might be made after this principle, without the inconvenience of embrazures; and the superior slope of the epaulment being inwards instead of outwards, would greatly facilitate this mode of firing.

If the situation will admit of the battery being sunk, even as low as the soles of the embrazures, a great deal of labour may be saved. In batteries without embrazures, this method may almost always be adopted; and it becomes in some situations absolutely necessary in order to obtain earth for the epaulment; for when a battery is to be formed on the crest of the glacis, or on the edge of the counterscarpe of the ditch, there can be no excavation but in the rear of the battery.

4. Batteries on a Coast—generally consist of only an epaulment, without much attention being paid to the ditch: they are, however, sometimes made with embrazures, like a common gun battery; but the guns are more generally mounted on traversing platforms, and fire over the epaulment. When this is the case, the guns can seldom be placed nearer than 3½ fathoms from each other. The generality of military writers prefer low situations for coast batteries; but M. Gribauvale lays down some rules for the heights of coast batteries, which place them in such security, as to enable them to produce their greatest effect. He says the height of a battery of this kind, above the level of the sea, must depend upon the distance of the principal objects it has to protect or annoy. The shot from a battery to ricochet with effect, should strike the water at an angle of about 4 or 5 degrees at the distance of 200 yards. Therefore the distance of the object must be the radius, and the height of the battery the tangent to this angle of 4 or 5°; which will be, at the above distance of 200 yards, about 14 yards. At this height, he says, a battery may ricochet vessels in perfect security; for their ricochet being only from a height of 4 or 5 yards, can have no effect against the battery. The ground in front of a battery should be cut in steps, the more effectually to destroy the ricochet of the enemy. In case a ship can approach the battery so as to fire musquetry from her tops, a few light pieces placed higher up on the bank, will soon dislodge the men from that position, by a few discharges of case shot. It is also easy to keep vessels at a distance by carcasses, or other fire balls, which they are always in dread of.

DURTUBIE estimates, that a battery of 4 or 5 guns, well posted, will be a match for a first rate man of war.

To estimate the Materials for a Battery.

Fascines of 9 feet long are the most convenient for forming a battery, because they are easily carried, and they answer to most parts of the battery without cutting. The embrazures are however better lined with fascines of 18 feet. The following will be nearly the number required for a fascine battery of two guns or howitzers:

90 fascines of 9 feet long.

20 fascines of 18 feet—for the embrazures.

This number will face the outside as well as the inside of the epaulment, which if the earth be stiff, will not always be necessary; at least not higher than the soles of the embrazures on the outside. This will require five of 9 feet for each merlon less than the above.

A mortar battery will not require any long fascines for the lining of the embrazures. The simplest method of ascertaining the number of fascines for a mortar battery, or for any other plain breast work, is to divide the length of work to be fascined in feet, by the length of each fascine in feet, for the number required for one layer, which being multiplied by the number of layers required, will of course give the number of fascines for facing the whole surface. If a battery be so exposed as to require a shoulder to cover it in flank, about 50 fascines of 9 feet each will be required for each shoulder.

Each

fascine

of

18

feet

will

require

7

pickets.

”

”

”

9

feet

”

”

4

”

12 workmen of the line, and 8 of the artillery, are generally allotted to each gun.

If to the above proportion of materials, &c. for a battery of two guns, there be added for each additional gun, 30 fascines of 9 feet, and 10 of 18 feet, with 12 workmen, the quantity may easily be found for a battery of any number of pieces.

The workmen are generally thus disposed; one half the men of the line in the ditch at 3 feet asunder, who throw the earth upon the berm; one fourth upon the berm at 6 feet asunder, to throw the earth upon the epaulment, and the other quarter on the epaulment, to level the earth, and beat it down. The artillery men carry on the fascine work, and level the interior for the platforms. This number of workmen may complete a battery in 36 hours, allowing 216 cubic feet tn be dug and thrown up, by each man in the ditch in 24 hours.

Tools for the Construction of a Battery.

Intrenching—1½ times the number of workmen required; half to be pick axes, and half shovels or spades, according to the soil.

Mallets—3 per gun.

Earth Rammers—3 per gun.

Crosscut Saws—1 to every two guns.

Handbills or Hatchets—2 per gun.

This estimate of tools and workmen, does not include what may be required for making up the fascines, or preparing the other materials, but supposes them ready prepared. For these articles, see the words Fascine, Gabion, Platform, &c. and for the construction of field magazines for batteries, see the word Magazine.

Note. The following estimate of the quantity of earth which may be removed by a certain number of workmen in a given time, may serve to give some idea of the time required to raise any kind of works. 500 common wheel barrows will contain 2 cubic toises of earth, and may be wheeled by one man, in summer, to the distance of 20 yards up a ramp, and 30 on a horizontal plain, in one day. In doing which he will pass over, going and returning, about 4 leagues in the first case, and 6 in the last. Most men, however, will not wheel more than 1¾ toise per day. Four men will remove the same quantity to four times the distance.

In a soil easy to be dug, one man can fill the 500 barrows in a day; but if the ground be hard, the number of fillers must be augmented, so as to keep pace with the wheel barrow man.

BEDS for Mortars.

Nature.

Weight.

Tonnage.

Len.

Bre.

Ht.

cᵂᵗ.

qʳˢ.

lb.

tⁿˢ.

cᵂᵗ.

qʳ

ft.

in.

ft.

in.

ft.

in.

Sea

38

3

13

3

3

2

13

Land Wood

21

2

7

1

6

0

7

0

2

6

2

3

”   Iron

50

0

0

2

10

0

6

3

3

1

1

6

Sea

32

2

14

2

2

2

10

Land Wood

10

0

20

0

4

2

6

6

1

8

1

10

”   Iron

23

0

0

1

3

0

4

8

2

4

1

1½

5½ Wood

1

0

22

0

2

0

2

9

1

4

0

10

4⅖ Wood

0

3

11

0

1

2

2

4½

1

2

0

9

Stool Beds for Guns.

Inch.

In.

42

Pounders

0

1

20

0

1

0

2

10

11 to 8¾

3¾

32

”

0

1

14

0

1

0

2

10

10

5½

3¼

24

”

0

1

14

0

1

0

2

9

10¼

6½

4

18

”

0

1

12

0

1

0

2

8

9½

6½

3¾

12

”

0

1

10

0

0

2⅔

2

8

10

6½

4

9

”

0

1

4

0

0

2

2

7

9½

5½

3½

6

”

0

1

0

0

0

1¾

2

6

9

4¾

3½

4

”

0

1

0

0

0

1

2

6

8¼

5¼

3

BOXES for Ammunition.—The dimensions of the common ammunition boxes vary according to the ammunition they are made to contain, in order that it may pack tight: this variation, however, is confined to a few inches, and does not exceed the following numbers.

Table of general Dimensions of Ammunition Boxes.

Exterior.

Weight when

empty.

Length.

Breadth.

Depth.

feet

inch.

feet

inch.

feet

inch.

lbs.

From

2

2

0

10

0

8½

20

To

2

9

1

6

1

6

30

Weight when filled, and Number contained in each.

Nature of Ammunition.

Weight of

Boxes when

filled with

Ammunition.

No. of Rounds

contained in

each Box.

cᵂᵗ.

qʳˢ.

lb.

No.

Shot fixed

with

powder

12 Prs.

Round

1

1

10

8

Case.

0

3

15

6

6 Prs.

Round

1

2

7

12

Case.

1

0

15

12

3 Prs.

Round

0

2

25

16

Case.

0

2

23

14

B

Shot fixed

to wood

bottoms

without

powder.

24 Prs.

Round

1

1

26

6

o

Case.

2

0

0

6

x

12 Prs.

Round

1

2

20

12

e

Case.

1

2

22

8

s

6 Prs.

Round

1

2

20

24

Case.

1

1

12

18

f

3 Prs.

Round

1

1

0

30

o

Case.

1

1

0

30

r

How’r.

Case.

8

1

1

2

3

5½

1

2

12

10

4⅖

1

2

22

20

Shells.

How’r.

Shells.

8  f

1

2

26

3

5½  i

1

2

12

10

4⅖  x

1

2

22

20

e

d

The common ammunition waggon will hold from 9 to 13 of these boxes in one tier.

The tonnage of ammunition in boxes is equal to its weight: about 12 boxes make one ton.

BOMB Ketch. The bomb ketches upon the old establishment carry one 13 inch and one 10 inch mortar; with eight 6 pounders, beside swivels, for their own immediate defence. The modern bomb vessels carry two 10 inch mortars, four 68 pounders, and six 18 pounders carronades; and the mortars may be fired at as low an angle as 20 degrees; though these mortars are not intended to be used at sea, but on very particular occasions; their principal intention, at these low angles, being to cover the landing of troops, and protect our coast and harbours. A bomb ketch is generally from sixty to seventy feet long from stem to stern, and draws eight or nine feet water. The tender is generally a brig, on board of which the party of artillery remain, till their services are required on board the bomb vessel.

Instructions for their Management and Security in Action.

1. A Dutch pump, filled with water, must be placed in each round top, one upon the forecastle, one on the main deck, and one on the quarter deck; and furnished with leather buckets, for a fresh supply of water.

2. The booms must be wetted by the pumps before the tarpaulins and mortar hatches are taken off; and a wooden skreen, 5 feet square, is to be hung under the booms, over each mortar, to receive the fire from the vents.

3. The embrazures being fixed and properly secured, the port must be let down low enough to be covered by the sole of the embrazure. Previous to its being let down, a spar must be lashed across it, to which the tackles for raising it again must be fixed: this spar serves to project the tackles clear of the explosion.

4. The mortars must not be fired through the embrazures at a lower angle than 20 degrees, nor with a greater charge than 5 lbs. of powder.

5. Previous to firing, the doors of the bulkhead, under the quarter deck, must be shut, to prevent the cabin being injured by the explosion.

6. The bed must be wedged in the circular curb, as soon as the mortar is pointed, to prevent reaction; the first wedge being driven tight before the rear ones are fixed, in order to give the full bearing on the table, as well as the rear of the bed. The holes for dog bolts must be corked up, to prevent the sparks falling into them.

7. When any shells are to be used on board the bomb, they must be fixed on board the tender, and brought from thence, in boxes in her long boat; and kept along side the bomb ship till wanted, carefully covered up.

8. In the old constructed bomb vessels it is necessary to hoist out the booms; and raft them along side previous to firing; but in these new ones, with embrazures, only the boats need be hoisted out; after which the mortars may be prepared for action in 10 minutes.

Proportion of Ordnance and Ammunition for a Bomb Ship, carrying two 10 Inch Mortars, to fire at low Angles, and at 45 Degrees, Four 68 Prs. and Six 8 Prs. Carronades.

NATURE.

In the

Bomb

Ship.

Tender.

Total.

Mortars, sea service with Beds, &c. 10 inch

2

—

2

Quoins for do.—2 for 45°—2 for 20° elevation,

4

—

4

Capsquares, with keys, &c. spare

2

—

2

Handspikes, large

4

—

4

Spunges, with rammer heads

4

—

4

Handscrews, small

2

—

2

Handcrow levers—6 feet

4

—

4

Handspikes, common

6

—

6

Linstocks, with cocks

4

—

4

Powder horns, new pattern

4

—

4

Match

cwts.

1

—

1

Marline

skeins

—

12

12

Budge barrels, copper hooped

1

1

2

Lanthorns,  Muscovy

2

2

4

”            dark

2

2

4

Carronades,   68 Prs.

4

—

4

”             18 Prs.

6

—

6

having sliding carriages, elevating screws,

spunges, rammers &c. complete.

Gun tackles, complete for

4

—

4

traversing mortars,  12 Prs.

Wads,  68 Prs.

270

270

540

”  ,  18 Prs.

480

180

660

Musquets

Bright

32

—

32

Black

8

—

8

Pistols, pairs

15

—

15

Swords

40

—

40

Pole axes

6

—

6

Pikes

40

—

40

Musquetoons

2

—

2

Flints, musquet

900

—

900

”  pistol

150

—

150

Ball Cartridges, musquet

2000

—

2000

”         ”       pistol

2000

—

2000

Shot,  musquet,

cwts. qrs. lbs.

1.0.0

—

1.0.0

”      pistol,

”   ”   ”

0.1.1

—

0.1.1

Round Carcasses, fixed,

10 inch

48

152

200

Empty Shells,

10 inch

48

352

400

Iron Shot,

1 lb.

1000

4000

5000

Fixed Shells,

10 inch

48

—

48

Case Shot, 68 Prs.

Carronades

20

20

40

Empty Shells, 8 in.

for Carronades

52

100

152

Shot, round, 68 Prs.

50

50

100

Carcasses, do. 68 Prs.

96

104

200

Shot, round,  18 Prs.

300

—

300

Case Shot, 18 Prs.

30

30

60

Carcasses,    do. fixed, 18 Prs.

150

150

300

Hand Shells, fixed,

sea service

—

150

150

Fuzes for do. spare

—

15

15

Paper Covers for cart’ges,

10 in.

106

609

715

”   ”   ”  ”  ,

68 Pr.

293

301

594

”   ”   ”  ”  ,

18 Pr

258

198

726

Flannel Cartridges, empty

to hold 5lbs.

106

—

106

for 10 in. mortars

do. 10lbs

—

609

609

Flannel Cartridges, empty

to hold 5lbs.

293

151

594

for 68 Prs. carronades

do.   4lbs

—

150

Flannel Cartridges, empty

528

148

726

for 18 Prs. to hold 1½ lbs.

Paper Cartridges, for bursting,

—

352

352

10 inches, empty

Paper Cartridges, for bursting, 8 inches, empty

—

100

100

Do. filled with 2lb. 10 oz. for 10 in.

48

—

48

Do. filled with 1 ”  14  ” for 8 in.

52

—

52

Fuzes, drove,

10 inch

57

388

445

”   ”

8 ”

57

110

167

Valencience composition

200 for 10 in. shells, at 14 oz. each,         lbs.

—

175

175

768 for 10 in. shells, at   9 oz. each,         lbs.

—

42

42

Tube Boxes, tin

12

—

12

Fuze composition, for priming carcasses,   lbs.

—

10

10

Powder bags

—

6

6

Portfires

—

200

200

Quick Match, cotton,.

lbs.

—

20

20

Spirits of Wine,

gals.

—

4

4

Kitt

lbs.

—

80

80

Bottoms of wood,

10 inch.

10

40

50

Signal Rockets, 1 lb.

doz.

—

2

2

Blue Lights,

”

—

3

3

Gunpowder for the mortars and

72

150

222

carronades, half barrels

Powder for priming,  do.

—

1

1

Powder for bursting, do.

—

28

28

with all the small articles which usually

attend mortars on every service, and the

articles necessary for the service of

carronades at sea.

Laboratory Chests,

4 feet

—

2

2

”         ”

3 feet

—

2

2

Handpumps for wetting the rigging, &c.

6

—

6

Leather Buckets

24

—

24

BREACH.—The batteries to make a breach, should commence by marking out as near as possible, the extent of the breach intended to be made; first, by a horizontal line within a fathom of the bottom of the revetement in a dry ditch, and close to the water’s edge in a wet one; and then by lines perpendicular to this line, at short distances from each other, as high as the cordon; then, by continuing to deepen all these cuts, the wall will give way in a body. The guns to produce the greatest effect should be fired as near as possible in salvos or vollies. The breach should be ⅓ the length of the face, from the center towards the flanked angle. When the wall has given way, the firing must be continued to make the slope of the breach practicable.

Four 24 Pounders from the lodgement in the covert way will effect a breach in 4 or 5 days, which may be made practicable in 3 days more.

Another way of making a breach is by piercing the wall sufficiently to admit two or three miners, who cross the ditch, and make their entry during the night into the wall, where they establish two or three small mines, sufficient to make a breach.—See Artillery at a Siege; see also Battery.

BRIDGES.—Manner of laying a Pontoon Bridge across a River.

The bank on each side, where the ends of the bridge are to be, must be made solid and firm, by means of fascines, or otherwise. One end of the cable must be carried across the river; and being fixed to a picket, or any thing firm, must be drawn tight by means of a capstan, across where the heads of the boats are to be ranged. The boats are then launched, having on board each two men, and the necessary ropes, &c. and are floated down the stream, under the cable, to which they are lashed endwise, by the rings and small ropes, at equal distances, and about their own breadth asunder; more or less, according to the strength required. If the river be very rapid, a second cable must be stretched across it, parallel to the first, and at the distance of the length of the boats; and to which the other ends of the boats must be lashed. The spring lines are then lashed diagonally from one boat to the other, to brace them tight; and the anchors, if necessary, carried out, up the stream, and fixed to the cable or sheer-line across the river. One of the chesses is then laid on the edge of the bank, at each end of the bridge, bottom up; these serve to lay the ends of the baulks upon, and as a direction for placing them at the proper distances, to fit the chesses that cover the bridge. The baulks should then be laid across the boats, and keyed together: their numbers proportioned to the strength required in the bridge. If the gangboards are laid across the heads and sterns of the boats from one side of the river to the other, they will give the men a footing for doing the rest of the work. Across the baulks are laid the chesses, one after another, the edges to meet; and the baulks running between the cross pieces on the under side of the chesses. The gangboards are then laid across the ends of the chesses on each edge of the bridge.

Precautions for passing a Bridge of Boats.

Whatever size the bridge may be, infantry should never be allowed to pass at the same time with carriages or cavalry. The carriages should always move at a certain distance behind each other, that the bridge may not be shook, by being overloaded. The horses should not be allowed to trot over the bridge; and the cavalry should dismount and lead their horses over. Large flocks of cattle must not be allowed to cross at once.

For the dimensions, weight, and equipage of a pontoon, see the word Pontoon.

When bridges are made to facilitate the communication between different parts of the approaches at a siege, they should, if possible, be placed above the town; or the besieged will take advantage of the current to float down large trees, or other bodies, in order to destroy the bridge. Two of such bridges should always be placed close to each other, in order to prevent the confusion of crossing and recrossing on the same bridge; the one being intended to pass over one way, and the other to return. Pontoon bridges will generally not support a greater weight than 4 or 5,000 pounds. Pontoons, when united as a bridge, will no doubt bear more in proportion, than when acted upon separately: but the weight which a pontoon will bear may be easily ascertained, by loading it with water till it sinks to any required depth, and then by calculating the number of cubic feet of water it contains, ascertain the number of pounds required to sink it to that particular depth.

C AMP—With some trifling variations, camps are formed after the same manner in all countries. This principle seems general, that there should not be more ground occupied by the camp of a body of men, in front, than the extent of their line when drawn out in order of battle. Intervals are however generally left between battalions of infantry of about one eighth their front, and between squadrons of cavalry of thirty or forty paces. An army is sometimes encamped in two lines, and sometimes in three; the distance between the lines varies according to the face of the country, from 200 to 600 yards, or more.

In the distribution of the front of a camp, two feet are generally allowed for every file of infantry, and three feet for each file of cavalry. When the ground will admit of it, the infantry are usually arranged in rows perpendicular to the front; each row containing the tents of one company; and the cavalry in the same position, each perpendicular row containing the horses of a troop.

The grenadiers and light infantry are usually placed in single rows on the flanks, and the battalion companies in double rows.

A single row, or one company, occupies in front, nine feet; and a double row, or two companies, twenty one feet, if formed of the old pattern rectangular tents, which hold only five men each. But if the new bell tents are used, 15 feet must be allowed for a single row, and 30 feet for a double row in front.

In the cavalry, a row or troop occupies in front as follow:

Old Tents.

New Tents.

Tent

3

yards.

5

yards,

From the front pole of the

3

3

tent to picket rope

For the horse

6

6

For the dung

2

2

14

yards.

16

yards.

The breadth of a row in front, whether of infantry or cavalry, being multiplied by the number of rows, and the product subtracted from the whole extent of front for a battalion of infantry, or a squadron of cavalry, will leave the space for the streets, which are generally divided as follows:

For the infantry,

59½

feet each.

For the cavalry,

30

feet each between the tents.

”  ”  ”

46

feet   ”        ”      horses.

The following is the Distribution of the Depth of a Camp of Infantry or Cavalry, when the Ground permits.

Distribution of the Depth of a Camp.

Infantry.

Cavalry.

Yards

Yards

From the quarter-guard parade to the

line of parade of battalion

line of parade of battalion

62

From this first line of parade to the

front of the -

Serjeant’s tents

16

quarter master’s

—

24

N. B. These tents open to the front.

To the first picket of horses

—

5

Infantry: for every tent in depth

”  old pattern, 9 feet

”  new pattern, 15 feet

Cavalry: for every horse, 3 feet

The soldiers tents for the infantry open

to the streets. The cavalry tents front

to the horses heads.

Suppose infantry 12 tents deep

o. pat.

36

60

”  cavalry, 60 horses

From the last tent of infantry, or the

last horse of the cavalry, to the front

of the subalterns’ tents

15

12

These tents open to the rear.

To the front of the line of captains

15

15

These open to the front. The captains, and

subalterns in the rear of their troops

or companies.

To the front of the field officers

10

15

Open to the front, opposite the outside

street of the battalion.

To the colonel’s

10

10

Opens to the front, opposite the main

street of the battalion.

To the staff officers

14

Open up the streets next the main street

10

To the first row of batmen’s tents

10

The batmen’s tents front their horses.

To the first row of pickets for bat horses

2

15

To the second row of ditto

10

To the second row of batmen

2

To the front of the grand sutler’s tent

10

The grand sutler is in the rear of the colonel.

To the center of the kitchens

15

20

The kitchens are 16 feet in diameter.

To the front of the petty sutlers

15

15

Directly in the rear of the kitchens: there are

allowed 6 yards in front by 8 deep.

To the rear guard

15

15

Opens to the rear.

Total depth required Yards

253

220

If the ground on which the camp is to be formed will not, from a swamp in the rear, or any other circumstance, admit of each troop or company being formed in one row perpendicular to the front; the distribution of the front of a battalion or squadron must be more contracted than the above, and laid out as follows: Find how many perpendicular rows will be required, by dividing the number of men in the battalion or squadron by the number the ground will admit of in one row; then the number of rows being multiplied by the breadth of one in front, will give that part of the front to be occupied by the rows; and the difference between it and the whole front allowed for the battalion or squadron, will be left for the streets; which, if the streets are to be equal, must be divided by their number, to find the breadth of each; or is otherwise easily divided into streets of unequal breadths. When two guns are attached to a battalion, they are posted on the right in the following order: from the right of battalion to the center of the first gun, four yards—from this to the second gun, 6 yards.—The muzzles of the guns in a line with the serjeants’ tents.

The subaltern of artillery, if any, in a line with the subalterns of infantry.—The rear of the gunner’s tents in a line with the rear of the battalion tents.

For the proper positions for camps, see the word Reconnoitering; and for the encampment of a park of artillery, see the word Park.

CARCASSES.—Composition.

Saltpetre

50

parts.

Sulphur

25

Antimony

5

Rosin

8

Pitch

5

Valencienne’s composition, so called, from its having been used by the Austrians at the siege of that place, has the effect of making shells answer the purpose of carcasses after they burst:

Saltpetre

50

parts.

Sulphur

28

Antimony

18

Rosin, or Swedish pitch

6

This composition is cast in copper cylindric moulds of 6 inches long, and of different diameters according to the shell in which it is to be used. It must be put in along with the bursting powder in pieces as large as the shell will admit, without preventing the fuze being driven down.

CARCASSES.—Their Dimensions and Weight, 1796.

Nature.

Weight.

Time

each

will

burn.

Empty.

Of

Composition.

Complete.

Round, for

lbs.

oz.

dr.

lbs.

oz.

dr.

lbs.

oz.

dr.

Min.

Mortars

and

How’rs.

13

194

10

11

18

14

—

213

8

16

11

10

89

13

11

7

8

11

97

6

11

8½

8

44

9

5

4

4

11

48

14

—

5½

For Guns

42

27

3

—

2

7

11

29

10

11

5

32

20

13

5

1

14

5

22

11

11

4½

24

14

12

—

1

9

11

16

5

11

4

18

11

13

11

1

1

5

12

15

—

4

For

Carronades

68

—

—

—

—

—

—

42

26

—

—

2

7

—

28

7

—

4½

32

21

10

—

1

13

—

23

7

—

4

24

14

5

—

2

5

—

16

10

—

3½

18

10

4

—

1

2

—

11

6

—

3

Oblong, for

Mortars

and

How’rs.

10

36

7

5

35

10

—

72

1

5

12

8

16

5

5

18

2

—

34

7

5

10

5½

1

12

2

6

15

—

8

11

3

6

4⅖

1

0

6

3

11

7

4

11

13

4

Note. It being found at the siege of Quebec, that the quantity of powder requisite for throwing the carcasses into the town, always destroyed them, the method of filling the interval between the powder and carcass with turf was adopted; and found to preserve the carcass, and to produce every desired effect.

CARRONADES.—Their Weight and Dimensions.

Nature.

Diameter

of Bores.

Length in

Weight.

Proportion

betw’n the Shot

and Carronade.

Ft.

In.

Calib.

cwt.

qr.

lb.

68

Prs.

8.05

5

2

7.702

36

—

—

59 to 1

”

4

0

5.962

29

—

—

42

”

6.84

4

3½

7.518

22

1

—

58 to 1

32

”

6.35

4

0½

7.679

17

—

14

62 to 1

24

”

5.68

3

7½

7.656

13

—

—

56 to 1

3

0

6.336

11

2

25

18

”

5.16

3

3

7.587

9

—

—

56 to 1

2

4

5.447

8

1

25

12

”

4.52

2

2

5.778

5

3

10

56 to 1

N. B. Carronades have not so much windage as guns.

See Windage.

Ranges with Carronades, 1798. The charge is ¹/₁₂ the weight of the shot and with one shot and one wad. The line of fire from 6 to 9 feet above the level of the water.

Nature.

68

42

32

24

18

12

Charge.

5lb 8oz

3lb 8oz

2lb 10oz

2lb

1lb 8oz

1lb 10oz

Yards

P. Blank

450

400

330

300

270

230

1 Degree

650

600

560

500

470

400

2 ”

890

860

830

780

730

690

3 ”

1000

980

900

870

800

740

4 ”

1100

1020

970

920

870

810

5 ”

1180

1170

1087

1050

1000

870

Note.—The highest charge for carronades is ⅛ the weight of the shot; the lowest ¹/₁₆.

Ranges with 8 inch shells, from 68 Pr. carronades.

Shells

Weight

Charge.

Flight.

Elevation.

First

graze.

Extreme

range.

lbs. oz.

43  11

3 lbs

1½

P. B.

302

1365

3  ”

—

5 Deg.

1140

4  ”

1½

1 ”

358

1843

”  ”

5

5 ”

1137

1250

”  ”

”

11½ ”

1767

CARRIAGE.—Weight of Field Carriages at present in use.

Horse Artillery Carriages.

cwts.

qrs.

lbs.

cwts.

qrs.

lbs.

12 Prs. gun and carriage complete for

—

—

—

45

0

14

service, with two men, and their

their appointments on the limber,

and 16 rounds of ammunition.

Ammunition waggon for do.complete,

—

—

—

33

3

0

with two men on the limber and

1 spare  wheel, 2 spare shafts,

78 rounds of ammunition

6 Prs. equipped as above, with 42 rounds

—

—

—

34

1

21

Ammunition waggon as above, 108 rounds

—

—

—

39

0

21

5½ Inch howitzer, equipped as above,

—

—

—

35

3

0

with 20 rounds

Ammunition waggon for do. as above,

—

—

—

39

2

0

with 52 rounds

Forge waggon, complete for travelling

—

—

—

19

2

14

Large tilted baggage waggon, empty

—

—

—

18

3

0

Equipage to be carried

—

—

—

12

0

0

12 Prs. Med. gun, carriage, without boxes

16

1

21

42

—

7

Limber to do.

7

2

14

Gun

18

—

—

12 Pr. light gun

12

—

—

36

2

21

Carriage complete

12

3

7

Limber, with empty boxes

12

3

14

6 Prs. Desaguliers

12

—

—

34

1

13

Carriage complete

11

—

14

Limber, to do. empty boxes

11

—

27

6 Prs. light battalion gun

6

—

—

24

1

21

Carriage without boxes, iron axletrees

9

2

—

Limber, with empty boxes

8

3

21

5½ Inch howitzer, light

4

3

7

24

—

14

Carriage, without boxes

10

—

7

Limber, with empty boxes

9

1

—

24 Prs. platform travelling carriage

22

3

—

84

2

16

Standing carriage for do. iron trucks,

and tackles of the carriage

13

3

16

Iron gun

48

—

—

Ball cartridge waggon, Duke of Richmond’s

pattern, with spare pole and swingle trees

16

1

17

36

1

17

Charge of musquet ammunition

20

—

—

Common pattern ammunition waggon, altered

16

2

—

36

2

—

Charge of ammunition

20

—

—

New infantry ammunition cart

9

1

14

21

1

14

Charge of ammunition

12

—

—

Common sling cart, complete

—

—

—

17

1

14

Common truck carriage

—

—

—

12

2

21

Common hand cart

—

—

—

4

1

—

Forge waggon, complete

—

—

—

13

2

14

Dimensions of certain parts of carriages, the knowledge of which may prevent many mistakes in arranging the different pieces for disembarkation, or in other similar situations.

Axletrees.—Most of the field carriages are now made with iron axletrees; the dimensions of which are as follows:

Iron

Axletrees.

Diameter of

the arm.

Length of arm.

At the

Shoulder.

At the

Point.

Box, or

Nave part.

Washer

part.

Total length

to linchpin.

Inch.

Inch.

Inch.

Inch.

Inch.

6 Pr. Light

3 Pr. Heavy

5½ Inch Howitzer

Ammuni. Waggon

Ball cartridge do.

2¾

1¾

13

⅝

13⅝

whether horse

artillery or the

park, whether

limber or carriage

Light 12 Pounder

3¼

2¼

16

¾

16¾

and limber

Medium 12 Pr.

3½

2½

16

¾

16¾

Limber to do.

2¾

2

13

⅝

13⅝

Wood

Axletrees.

Carriage.

Limber.

Di. of arm.

Length

of

Nave.

Di. of arm.

Length

of

Nave.

At

Shoulder.

At

Point.

At

Shoulder.

At

Point.

Inch.

Inch.

Inch.

Inch.

Inch.

Inch.

24 Prs. Heavy

7

4.9

18

6

3.3

16

12 Prs. Med.

6

4

16

6

4

12

6 Prs. Des’rs.

5½

3½

13½

5½

3½

13½

6 Prs. Light

5

3

13

5

3

13

3 Prs. Des’rs.

2½

1¼

2½

1¼

3 Prs. Light

Howitzer, 8 In.

6½

17

5½

15

”    ,  5½ In.

5½

13

4¼

11½

”    ,  4⅖ In.

4½

12

4

10

Fore

Hind

Ammunition

5

2.9

14

5

2.9

13

waggon, with

folding sides

Close bodied

5

3.3

14

5

2.9

14

ammunition waggon

Diameter of the Wheels of the Field Carriages at present in Use:

Diameter.

All the horse artillery carriages, limbers,

5

feet.

and waggons; the heavy 6 Prs. and long

3 Prs. and their limbers; the carriage

of a 6 Pr. battalion gun, and a light

5½ inch howitzer; the hind wheels of

a common ammunition waggon

Limber to light 6 Pr. and 5½ howitzer,

4 ft.

8 in.

Med. 12 Pr.—limber, 4 ft. 6 in.—carriage,

4 ft.

8 in.

Sling cart

5 ft.

8 in.

Fore wheels of an ammunition waggon,

4

feet.

Pontoon carriage

Fore

3

feet.

Hind

5 ft.

6 in.

8 Inch Howitzer

Limber

4

feet.

Carriage

5

feet.

Ball Ammunition Cart

5

feet.

24 Prs. Platform Carriage

Fore

4

feet.

Hind

4 ft.

2 in.

Dimensions and Weight of Standing Gun Carriages.

Nature.

32

24

18

12

9

6

Ft.

in.

Ft.

in.

Ft.

in.

Ft.

in.

Ft.

in.

Ft.

in.

Axletrees, length

4

9

4

7

4

3

3

9

3

6½

3

4

Side pieces, length

6

4

6

0

5

9

5

6

5

3

5

0

Whole heighth to

trunnion beds

2

9

2

7

2

6

2

3

2

1

2

0

Weight of carriage,

ct.

qr.

ct.

qr.

ct.

qr.

ct.

qr.

ct.

qr.

ct.

qr.

bed & coins

9

0

8

0

7

0

6

0

3

3

2

3

Carriages on a march. See Marching.

For wood of which carriages are made, see the word Wood.

CARTRIDGES for guns.

Of  Paper.

Weight

of one

Dozen.

Length.

Tonnage.

Nᵒ. packed in

¾ Ton Vat.

Pounders.

lbs.

oz.

dr.

Ft.

In.

Number.

42

”

3

0

0

2

4

1000

32

”

3

0

0

2

4

1100

24

”

3

0

0

2

4

1400

18

”

2

14

0

2

4

1500

12

”

2

4

0

2

4

1600

9

”

2

4

0

2

4

1800

6

”

1

5

0

2

0

2000

4

”

1

1

0

1

7

2200

3

”

1

1

0

1

7

2200

Of  Flannel.

42 and 32

2

2

0

2

3

The tonnage

24

Heavy

1

12

0

1

10

of flannel

Medium

1

6

0

1

5

cartridges is

Light

1

1

8

1

0

⅕ more than

18

——

1

6

0

2

3

that of paper.

12

Heavy

1

3

0

1

6

Medium

0

11

0

1

2

Light

0

8

0

0

10

9

——

0

10

0

1

4

6

Heavy

0

14

0

1

1

Medium

——

——

Light

0

5

0

0

9½

3

——

0

6

0

0

8

13

Inch Mortar

1

2

8

1

6

10

”      ”

0

10

8

1

1½

8

”      ”

0

7

0

1

0

5½

”      ”

0

4

0

0

9

4⅖

”      ”

0

3

0

0

7

8

In. Howitzer

0

10

8

1

1½

5½

”      ”

0

4

8

0

9½

4⅖

”      ”

0

4

0

0

9½

Cartridges for small arms.

- (A) = Powder contained in each Cartridge.

- (B) = Nᵒ. of each tied in one Bundle.

Nature.

(A)

(B)

Nᵒ. contained

in one Barrel.

Weight of one

Barrel filled

1 Sheet

of Paper

makes

Whole.

Half.

Whole.

Half.

drms

Nᵒ.

Nᵒ.

Nᵒ.

Ct.

qr.

lb.

qr.

lb.

Nᵒ.

Wall pieces

10

6

1400

500

2

2

19

3

24

6

Musquet

6

10

2100

1000

1

3

10

3

24

12

Carbine

4

10

2853

1500

1

3

7

3

26

16

Do. pistol

3

10

4400

1500

1

3

17

3

21

24

Com. pistol

3

10

2000

3

11

24

7 Bar. guns

1½

14

1000

in kegs

Musquet Cartridges, by different powers in Europe.

Weight of

Powder

Cartridges,

complete

oz.

dr.

gr.

oz.

dr.

gr.

English.

0

6

0

1

9

11

Hessian.

0

7

10

1

7

2

Austrian.

0

6

13

1

6

4

Dutch.

0

10

10½

1

12

4

French.

0

7

4½

1

6

0

CASE SHOT. See Shot.

CHAMBERS.—In 1787 and 1789 experiments were made at Woolwich with an 8 inch mortar, with four shifting chambers, to ascertain which form gives the longest range.

The chambers were all of the same capacity, viz. 63.7 cubic inches, and contained two pounds of powder. Their forms were:

1st. Common conical chamber with the circular bottom.

2d. The same reversed.

3d. The cylindric chamber with circular bottom.

4th. The spheric chamber.

The ranges were the medium of 6 rounds; from them it appears, that when the spheric chamber is filled with powder, it has the advantage in point of range; but when smaller charges are used, its ranges are found to be shorter than those of other forms. The conical (No. 1.) chamber of the present establishment gives the longest range under other circumstances.

CHARGES.

Charges for Field Guns.

lbs.

12

Prs.

Medium

and

Heavy

for

Round

Shot

4

”

”

”

”

”

”

Case

”

3½

12

Prs.

Light

”

Round

”

3

”

”

”

”

Case

”

3

6

Prs.

Desaguliers

”

Round

”

2¼

”

”

”

”

Case

”

2

6

Prs.

Medium

”

Round

”

2

”

”

”

”

Case

”

6

Prs.

Light

”

Round

”

1½

”

”

”

”

Case

”

1¼

3

Prs.

Heavy

”

Round

”

1

”

”

”

”

Case

”

3

Prs.

Light

”

Round

”

12 oz.

The charge for battering guns is ⅓ the weight of the round shot, for round shot, and ¼ of it for case shot.

The charge for carronades is usually ¹/₁₂ the weight of the shot. The highest is ⅛, and the lowest ¹/₁₆.

By the experiments made at Woolwich in March 1801, it is recommended, that when cylinder powder is used on service, the charges of field ordnance with round shot, shall be reduced to the usual quantities for case shot. The same experiments recommend, that the thickness or length of the wood bottom be varied, in order to change the position of the shot, and thereby save the bore; and that the paper cap which is usually thrown away on service, shall be put over the shot before it is introduced into the piece.

For charges for small arms see the word Cartridges.

Charges of French Guns in French Weights.

lbs.

24 Prs.

8

Siege

16 Prs.

5½

12 Prs.

4

Field

¼ less for

Case Shot.

8 Prs.

2½

4 Prs.

1½

CHEVAUX DE FRIZE.—The body or beam of a chevaux de frize is generally made 9 feet long, and 6 inches square, and weighs 41 lbs. The spears are 33 in number, weighing 2 lb. each, are 5 feet long, and 1¼ inches square. They are placed 9½ inches asunder.

COMPOSITION.—For the composition of fuzes, portfires, tubes, carcasses, see those words.

Composition for Kitt.

For Fire Balls, 1794.

lbs.

lbs.

oz.

Rosin

9

Rosin

5

8

Pitch

6

Sulphur

3

0

Beeswax

6

Allum powder

1

8

Tallow

1

Starch, ”

0

8

Saltpetre

4

6

Mealed powder

8

0

Linseed oil

¼ pint.

Oil of spike

1 pint.

Bengal Lights.

First Composition.

lbs.

oz.

Saltpetre

7

0

Sulphur

1

12

Red orpiment

0

8

Second Composition.

lbs.

oz.

Saltpetre

2

4

Sulphur

0

8

Antimony

0

4

Orpiment

0

1½

Light Balls.

Nitre

40

parts

Sulphur

15

Antimony

3

Pitch

3

This composition to be carefully fused, and cast into the shape of balls, which when cold will be sufficiently hard to be fired from a small mortar.

Composition for Suffocating Pots.

Sulphur

6

parts

Nitre

5

This composition when intimately mixed, to be rammed into wooden boxes, and primed in the usual way.

This composition will answer for fumigation.

Chinese or White Light.

Nitre from

50 to 60

parts

Sulphur

16 to 20

Antimony

5

Orpiment

8 to 10

For Smoke Balls.

lbs.

Corned powder

10

Saltpetre

2

Pitch

4

Seacoal

3

Tallow

1

For Fire Hoops, Fire Arrows,

and Fire Lances.

lbs.

oz.

Mealed powder

1

0

Saltpetre

3

0

Flour of sulphur

0

8

Linseed oil

½ pint.

Composition to fill cases for

setting fire to Fascine Batteries.

lbs.

oz.

Mealed powder

1

4

Saltpetre

6

0

Sulphur

1

8

All dry compositions must be well mixed; first by the hands, and then passed several times through fine hair sieves, that the ingredients may be thoroughly incorporated. In mixing compositions which require fire, the greatest precautions are necessary; particularly in those where gunpowder enters. The dry parts of the composition may in general be mixed together first, and put by degrees into the cauldron, while the other ingredients are fluid, being well stirred all the time of putting in. When the dry ingredients are inflammable, the cauldron must not only be taken off the fire, but the bottom must be dipt in water, to prevent the possibility of accidents while mixing them.

R. LAB.

CONVOYS.—A waggon with four horses occupies about sixteen paces; a mile will therefore hold about 117 waggons: but allowing a short distance between, each waggon in travelling, a mile may be said to contain 100 waggons. Waggons in convoy may travel from one to two miles per hour, according to the roads and other circumstances. A great object in convoys is to preserve the horses as much as possible from fatigue. For this purpose, if the convoy amounts to many hundred waggons, they must be divided into divisions of not more than 500 each. Should it consist of thousands, it will be adviseable to divide them into grand divisions, and then again into subdivisions of 500 each: by this means, and the time of departure being calculated by the following rules, each division may remain at rest, till just before its time of movement; and which will prevent the necessity of the latter part of a large convoy being harassed for a considerable time before its turn to move.

RULE 1. To find the time in which any number of waggons may be driven off: Divide the number of waggons by 100, and multiply by the time of travelling one mile.

RULE 2. To find the time in which any number of waggons will drive over any number of miles: To the time they take in driving off, add the time any one of the waggons takes to travel the distance.

The different divisions of the convoy should be numbered, and obliged each day to change the order of their marching.

Whenever the progress of a train of waggons is arrested by the breaking down of any one of them, or other delay, all the waggons in the rear of the stoppage, should immediately drive up into the first open space, to as great a number as the open space will hold; this keeps the convoy together and better under the care of the escort.

The escort for a convoy should be divided into front, center, and rear guards; beside the divisions for the flanks, which should never be beyond musquet shot, or at most 400 yards from each other. The whole escort, should never be so separated that they could not be collected in an hour. Under proper precautions against an enemy, a convoy of any size cannot travel more than five or seven miles per day.

TEMPLEHOFT.

D ISPART.—The dispart of a gun is the half difference between the diameter of the gun at the base ring, and at the swell of the muzzle. The general dispart of all guns is about the ¹/₅₆ part of their length. See the disparts of French and English guns under the word Tangent Scale.

Fig. 1.

DISTANCES.—Inaccessible distances may be found several ways; the most correct of which of course is by means of proper mathematical instruments; which, however, are not always to be had in the field.

The following different methods are laid down by several authors, where instruments cannot be had.

I. Wishing to know the distance of the object A from B—(fig. 1.) place a picket at B and another at C, at a few fathoms distance, making A B C a right angle, and divide B C into 4, 5, or any number of equal parts: make another similar angle at C, in a direction from the object, and walk along the line C D till you bring yourself in a line with the object A, and any of the divisions, (say o) of the line B C. Then, as Co : CD :: Bo : BA.

VAUBAN.

Fig. 2.

II. To gain the distance between two objects C and D (fig. 2) from any point A, taken in the line C D, erect the perpendicular A E: on which set off from A to E, 1 or 200 feet, more or less, according to the distance between the points C and D; set off from E to G in the prolongation A E, ⅛ or ⅒ of A E; at G raise the perpendicular G F, and produce it towards I; plant pickets at E and G, then move with another picket on G F till it becomes in a line with E and D; and on the prolongation of the perpendicular F G place another picket at I in the line with E and C; measure F I, and it will be as GE : AE :: FI : CD.

Fig. 3.

LANDMAN’S

Practical Geometry on the Ground.

III. To gain the inaccessible length A B, (fig. 3.) of the front of a fortification; plant a picket at C, from whence both points may be seen: find the lengths C A and C B by the method just given (Nᵒ 1.) make C E ¼, or any part of C B, and make C D bear the same proportion to C A: measure D E, then it will be as CD : DE :: CA : AB.

NOTE. Nearly after the same manner may be ascertained the distance from B to A when the point B is accessible; for having measured the line C B, and made the angle C E D equal to C B A, it will be, as CE : DE :: CB : BA.

IV. The distance of a battery, or other object, may be ascertained by the tangent scale on the breach of a gun. It is however necessary in this case to know the height of the object, the distance of which is required. Lay the gun by the upper line of metal for the top of the object, then raise the tangent scale till the top of the scale and the notch at the muzzle are in a line with the bottom of the object, and note what length of tangent scale is required: then say, as the length of the scale above the base ring of the gun is to the length from the base ring to the swell of the muzzle, so is the height of the object to its distance from the muzzle of the gun.

LOMBARD’S TABLES.

V. The breadth of a river, or other short distance, may be taken thus:—take two pickets of different lengths, drive the shortest into the ground close to the edge of the bank; measure some paces back from it, and drive in the other till you find, by looking over the tops of both, that your sight cuts the opposite side.—Then pull up the first picket, measure the same distance from the second, in any direction the most horizontal, and drive it as deep in the ground as before.—Consequently, if you look over them again, and observe where the line of sight falls, you will have the distance required.

TEILK.

VI. The following simple method of ascertaining the breadth of a river may be sufficiently correct for some cases: Place yourself at the edge of one bank, and lower one corner of your hat till you find the edge of it cuts the other bank; then steady your head, by placing your hand under your chin, and turn gently round to some level spot of ground, and observe where your eyes and the edge of the hat again meet the ground; your distance from that point will be nearly the breadth of the river.

TEILK.

VII. Distances ascertained by the difference between the true and apparent level.

See Levelling.

VIII. Distances measured by sound.

See Sound.

IX. The following simple micrometer may be so usefully applied to military purposes, that I shall extract it verbatim from the Philosophical Transactions for 1791, where it is described by Cavallo. This micrometer consists of a thin and narrow slip of mother of pearl, finely divided, and placed in the focus of the eye glass of a telescope, just where the image is formed.—It is immaterial whether the telescope be a reflector, or a refractor, provided the eye glass be a convex lens and not a concave one, as in the Galilean construction.—The simplest way to fix it, is to stick it on the diaphragm, which generally stands within the tube, and in the focus of the eye glass.—When thus fixed, if you look through the eye glass, the divisions on the scale will appear very distinct, unless the diaphragm is not exactly in the focus; in which case the scale must be placed exactly in the focus, by pushing the diaphragm, backwards or forwards, when this is practicable; or else the scale may be easily removed from one surface of the diaphragm to the other, by the interposition of a circular bit of paper or card, or a piece of sealing wax.—This construction is fully sufficient when the telescope is always to be used by the same person; but when different persons are to use it, then the diaphragm, which supports the micrometer, must be so constructed as to be easily moved backwards or forwards, though that motion need not be greater than about the tenth or eighth of an inch. This is necessary, because the distance of the focus of the same lens appears different to the eyes of different persons; and therefore whoever is going to use the telescope for the mensuration of an angle, must first unscrew the tube which contains the eye glass and micrometer, from the rest of the telescope, and, looking through the eye glass, place the micrometer where the divisions of it may appear most distinct to his eye. The mother of pearl scale may be about the 24th part of an inch broad; its length is determined by the aperture of the diaphragm; its thickness that of writing paper. The divisions on it may be the 200th of an inch, which may reach from one edge of the scale to about the middle; and every fifth and tenth division may be a little longer, the tenths going quite across. When the telescope does not magnify above 30 times, the divisions need not be so minute. For the sake of those not conversant in trigonometry, the following is an easy method of determining the value of the divisions on the scale. Mark upon a wall or other place, the length of 6 inches; then place the telescope before it so that the 6 inches be at right angles to it, and exactly 57 feet 3½ inches distant from the object glass of the telescope. This done, look through the telescope, and observe how many divisions of the micrometer are equal to it, and that same number of divisions will be equal to half a degree, or 30´; and this is all that need be done to ascertain the value of the scale. The reason on which it is founded is, that an extension of six inches at the distance of 57 feet, 3½ inches, subtends an angle of 30´, as is easily calculated by trigonometry. To save the trouble of calculation, a scale may be made requiring only inspection. Thus, draw a line equal to the diameter of the field of the telescope, and divide its under side into the same number of parts as are on your micrometric scale, and, by the above operation on the wall, having determined the value of 30´, which we will suppose to correspond with 16 divisions on the scale, mark 30´ on the opposite side of the line, opposite 16 on the lower; 15 opposite 8, and so on.

By the following table the results may be ascertained by inspection only: thus, suppose an extension of 1 foot is found by the table to subtend an angle of 22′, the distance will be 156.2: and suppose at the distance of 171.8 an object subtends an angle of 20′, its height will be found to be 1 foot; or, suppose an object of 6 feet high to subtend an angle of 20′, the distance is 1030.8, by multiplying 171.8 by 6.

Table of Angles subtended by 1 Foot,

at different Distances.

Minutes.

Distances

in feet.

Minutes.

Distances

in feet.

1

3437.7

31

110.9

2

1718.9

32

107.4

3

1145.9

33

104.2

4

859.4

34

101.1

5

687.5

35

98.2

6

572.9

36

95.5

7

491.1

37

92.9

8

429.7

38

90.4

9

382.0

39

88.1

10

343.7

40

85.9

11

312.5

41

83.8

12

286.5

42

81.8

13

264.4

43

79.9

14

245.5

44

78.1

15

229.2

45

76.4

16

214.8

46

74.7

17

202.2

47

73.1

18

191.0

48

71.6

19

180.9

49

70.1

20

171.8

50

68.7

21

162.7

51

67.4

22

156.2

52

66.1

23

149.4

53

64.8

24

143.2

54

63.6

25

137.5

55

62.5

26

132.2

56

61.4

27

127.3

57

60.3

28

122.7

58

59.2

29

118.5

59

58.2

30

114.6

60

57.3

DRAG ROPES—

weight

length

With

5 pins

6 lbs.

8 oz.

21 feet.

4 ”

5

6

13

3 ”

5

0

12

E MBARKATION

1. Of Ordnance and Stores.—The first thing necessary is to prepare a list of all the articles to be embarked, with the weight of each. This list must have a large column for remarks. The tonnage required for bulky articles will be generally ⅓ more than their actual weight; but the tonnage of ordnance, shells, shot, &c. will be equal to their weight. If vessels be paid according to the tonnage they carry, the masters will of course stow away as much as the ships will hold; but if, by the voyage, they will be averse to loading their ships too much; a naval officer should therefore always attend to see that the ships are properly stowed.

Ordnance and stores may be embarked either for the purpose of merely transporting them to another situation, or for a military expedition. In the first case, each ship must be stowed with as much as it will carry, and every article that relates to one particular species of service or ordnance, must be put on board the same ship; that in case one ship be lost, the others may remain in themselves complete. This principle must of course be likewise attended to in an embarkation for an expedition; but a more particular distribution must take place of the stores when on board. With each piece of ordnance must be placed every thing necessary for its service; its side arms, carriage, limber, ammunition, &c. so as to be readily come at, when required to be disembarked. If it be an embarkation of ordnance, &c. for a siege, not only every thing necessary for the service of the pieces of ordnance should be arranged with them; but also every thing necessary for the construction of the battery on which they are mounted. It will be adviseable in this case, to put different natures of ordnance in the same ship, in proportions according to the service required of them. In general it will be best to put the heavy articles in first, and every thing that is light, easy to be removed, or likely to be first wanted, on the top. Previous to embarkation, the guns, carriages, waggons, &c. must be dismounted, but first numbered as follows: and the number of each article marked in the list, in the column of remarks. Give each piece of ordnance and its carriage the same number. Give the ammunition and other carriages, different numbers from the ordnance carriages. Then give every limber, whether of ordnance carriage, ammunition carriage, or waggon, the number of its respective carriage. If for a simple transport, arrange the small stores, side arms, &c. according to their several natures; but if for an expedition, every thing belonging to each particular piece of ordnance must be collected together, and the cases or chests in which they are put, marked with the number of the piece of ordnance to which they belong, their natures and description. If there be any doubt of the different parts of the carriages, being made with that uniformity, so essentially necessary, every part which is separated, must bear the number of its carriage. This precaution at any rate may be a good one, if the same vessel contain different natures of ordnance or carriages.

The axletrees need not be taken off the carriages, if the vessel be of a sufficient size to admit them when fixed, as they are not easily replaced without workmen and a tedious operation. When a carriage is dismounted, all the small articles, such as elevating screws, linch pins, drag washers, cap squares, &c. must be carefully collected, and secured in a box, marked with the description of stores, and number of the carriage to which they belong. All carriages or waggons embarked with their axletrees fixed, must be arranged in the ship, side by side, and alternately front and rear, that their axletrees may not interfere with each other, and take too much room. Every transport or other vessel employed in carrying troops or stores for an expedition, should be numbered on the quarters and on the bows, with figures as large as 2 or 3 feet, and on the sails, that they may be known at a distance. The number of the ship, her name and tonnage, and the master’s name must be entered in the list of the stores which she carries.

In disembarking ordnance and stores, they must be landed exactly in order, the reverse of what they were shipped. The carriages and waggons must be mounted as soon as possible, and every nature must be arranged as far from the shore as possible to prevent confusion. If the disembarkation take place in the presence of an enemy, the vessels of course must be loaded accordingly; and the field ordnance, with their carriages, ammunition, &c. must be so arranged as to be first landed, and with the greatest ease possible. In this case, the entrenching tools must also be kept in the greatest readiness.—Aide Memoire.

2. Of Troops.—All transports taken into His Majesty’s service, are under the direction of the Transport Board, and of their agents at the different ports at home and abroad. No troops or other persons can be put on board them, or victualled, but by an order from this Board, or one of its agents. Troops embarked on board transports or ships of war (except as marines) are only allowed ⅔ of a seaman’s allowance of provisions. (See the word Ration.) It is therefore necessary to divide the men into messes of 6 each. Six women to 100 men embarked on foreign service, are allowed provisions; and 10 women to 100 men on home service. The births on board transports, are usually made 6 feet square, and each admits 4 men at a time; but agreeable to the regulations for the army for 1799, one third of the men are always to be on deck; therefore 6 men (or one mess) are told off to each birth, ⅓ of whom are always on watch. The commanding officer of the troops on board a transport, has a right to peruse the charter party of the ship, which points out every different article, as firing, candles, boats, utensils, &c. which the ship is engaged to find for the use of the troops on board. It likewise expresses the part of the ship allotted to the officers, to the master, the mate, and the agent, should there be one on board.

EXERCISE of Artillery.—With 9 men to a field gun.

When 15 men are attached for the service of a gun in the field, they are numbered from 1 to 15; but when the gun is not to be advanced by men, the first six numbers are left out, and the remaining nine men are numbered from 7 to 15. The exercise of field guns of a heavy nature varies but little from the light ones. Though different duties done by the men attached to the one, should, as nearly as possible, be kept up at the other; as thereby is prevented that confusion which must arise when men removed from a light gun to a heavy one, change their numbers, though their duties at each be the same. The following will be the position of 9 men, for field ordnance of all natures, in the

1. Line of March.

Numbers 7, 9, 12, and 15, on the left of the gun; 8, 10, 13, 14, and 11, on the right; numbers 7 and 8 opposite the muzzle of the gun; 9 and 10 opposite the breech; 12 and 13 opposite the trail; 14 opposite the axletree of the limber; 11 opposite the shafts; 15 leads the limber horse; the driver leads the front.

2. Position and Duties of 9 men

when prepared for Action.

Light Guns.—7 spunges, 8 loads, 9 serves the vent, 10 fires, 11 commands, 12 carries the match and water bucket, 13 serves 8 with ammunition from 14, who carries a cartouch and a pair of drag ropes; 15 holds the limber horse, and carries a cartouch.

Positions.—7 between the right wheel and the muzzle; 8 between the left wheel and the muzzle; 9 clear of the rear of the right wheel; 10 clear of the left wheel, both in a line with the vent; 11 on the left of the handspike; 12 on his right, clear of 9; 13 covers the left wheel, 5 yards in the rear; 14 covers the right wheel, 10 yards in the rear. The limber is 25 yards directly in the rear of the gun.

Heavy Guns.—This is the same as with the light guns, except that 7 and 8 stand outside the wheels, and 8 assists 7 to ram home, if necessary.

Howitzers.—Positions are the same as the heavy guns, but the duties different. 7 spunges, uncaps the fuze, and puts in the shell; 8 takes the sheepskin out of the piece, lays it on the ground, with the woolen side up, loads with cartridge, wipes the bottom of the shell, (when 7 holds it up) puts in the sheep skin again, and pulls it out with his left hand on the word Ready: He stops the muzzle with it immediately that the piece is fired; 9 serves the vent; 10 fires; 11 commands; 12 carries the match and bucket; 13 serves 8 with cartridges from a cartouch; 14 serves 7 with shells from the limber, which he lays on the sheep skin; 15 attends the limber. As from unavoidable accidents the number of men attached to a gun, may be reduced, it will be necessary if the vacancies happen amongst those doing the most essential duties, to immediately replace them by those doing the most subordinate duties.

The following method of distributing the duties amongst a smaller number of men, will be equally applicable to all natures of field ordnance.

Nᵒ. of

men.

Nature.

Numbers retained.

The vacancies,

how supplied.

9

Gun

7

8

9

10

11

12

13

14

15

complete.

Howr

7

8

9

10

11

12

13

14

15

8

Gun

7

8

9

10

11

13

14

15

Nᵒ. 12 being  dropt,

Nᵒ. 11 does his duties.

Howr

7

8

9

10

11

13

14

15

7

Gun

7

8

9

10

11

13

15

Nᵒ. 14’s pouch is laid on

the ground;

13 carries it when moving.

Howr

7

8

9

10

11

14

15

Nᵒ. 8 serves himself with

cartridges

6

Gun

7

8

9

11

13

15

Nᵒ. 9 serves the vent with his

left hand faces about and fires.

Tube box on left side.

Howr

7

8

9

11

13

15

5

Gun

7

8

11

13

15

Nᵒ. 11 does all the duties of 9, as in

the last change, his own duties, and

those of 12.

Howr

7

8

11

14

15

4

Gun

7

8

11

15

Nᵒ. 8 fetches his own ammunition;

7 serves his own shells.

Howr

7

8

11

15

3

Gun

7

11

15

Nᵒ. 7 serves and loads all the ammunition.

—Nᵒ. 7 & 15 must change duties

occasionally.

Howr

7

11

15

3. To Limber up.—Light Guns and Howitzers.

The whole of the men face towards the gun; 11 unships his traversing handspike; the limber is brought up by 15, rather to the right of the gun, and then turned to the left about; 12 and 13 raise the trail, and place it on the limber, in which they are assisted by 7 and 8 bearing down on the muzzle, and 9 and 10 at the wheels; 11 chains the limber.

Heavy Field Guns, or Howitzers.—The only difference from the above is, that 9 and 10 assist 12 and 13 to raise the trail, and 14 and 15 stand to the gun wheels.

4. To unlimber.—Light Guns and Howitzers.

The whole face towards the gun; 11 unchains the limber; 12 and 13 lift the trail off the pin tail, and set it on the ground, in which they are assisted, as in limbering up, by 7, 8, 9, and 10; 11 ships the traversing handspike, and the whole assume the position for action. The limber is led by 15, and the driver, 25 yards to the rear, and there turned to the left about. The leading horse is unhooked by the driver, and tied to the rear of the limber.

Heavy Field Guns, and Howitzers.—The same as the light ones, except that 9 and 10 assist 12 and 13 to raise the trail, and 14 and 15 stand to the gun wheels. The heavy guns have generally mounted riders, in which case the leading horses are not unhooked.

It must be understood, that simply to limber up, or to unlimber, means that the gun is to be placed upon its limber, or lifted off, without changing its direction; but guns may be limbered up to the front, to the right, or to the left, according as it is intended to advance in any one of those directions; and unlimbered to the rear to prepare for action to the front, to the left for action to the right, and to the right for action to the left. To limber up, or to unlimber, in any of these situations, is exactly the same as those already given, except that in the first, previous to limbering up, the trail is thrown round by No. 11, assisted by 12, if necessary, into the direction specified by the word of command, and the limber is brought up to that side to meet it; and in the second, the trail, after being taken off the limber, is carried round to the rear, right, or left, according as the word of command expresses, before it is put to the ground, and the limber goes round to the rear of the gun.

It must be here remarked, that the front of a gun, or line of guns, or column of guns, is that to which the men at the gun front, without any respect to the situation of the gun or carriage. The trail of the carriage, when moved round to the rear or the contrary, whether in limbering up or unlimbering, must always be carried round to the right, and the limber, or a horse, when brought up to advance or retire a gun, must always be brought up on the right side, and go off on the left; and whenever the limber is turned about, it must be to the left about. By attending to these precautions the greatest confusion is avoided.

Other Methods of advancing Guns.

5. The gun being in the position for action, prepares to advance slow; 7 and 8 step outwards, 3 yards; 9 and 10 place themselves in line with the axletree, leaving room for 12 and 13, (who each bring a drag rope from 14) to pass between them and the wheels; 12 and 15 as they pass give the chain ends of the drag ropes to 9 and 10, who hook them to the washers; 12 and 13 man the Front pins, 7 and 8 the center, and 9 and 10 the rear.

This is only practised with light guns.

Prepare for Action.—7, 8, 9, and 10 quit their pins; 12 and 13 go to the rear; 9 and 10, as soon as 12 and 13 have passed them, unhook the drag ropes; 12 and 13 carry them to 14; 13 gets his ammunition.

6. Prepare to advance with a Horse.

Light Pieces.—7 gives his spunge to 9; 7 and 8 unhook the chain traces from the breast of the carriage, and lay them over the spokes of the wheels; the driver brings up a horse to the front, by the right; 7 and 8 unhook the horses traces from the back band, and hook them to the short gun traces, and then take post outside the wheels; 7 takes his spunge.

Heavy Pieces.—This is done with two horses, one before the other; 7 and 8 hook the horse, the driver rides to the rear horse, and 9 and 10 hook the rear horse to the short gun traces.

Prepare for Action.—The different numbers exactly undo what they have just done.

7. Prepare to advance with a Limber.

The only difference between this, and advancing with a horse, is that the limber is brought up to the front; and 15 brings up a drag rope, the center of which he lays over the pin tail, and 7 and 8 hook the ends to the short drag chains of the carriage.

Methods of retreating Guns.

8. Prepare to retreat slow.—7 and 8 place themselves in a line, with the axletree of the carriage on each side; 9 and 10 in a line with the trail; 12 and 13 get each a drag rope from 14, and give the chain ends to 7 and 8, who hook them to the drag washers; 7 and 8 man the rear pins: 9 and 10 the center-pins; 12 and 13 the front; 10 carries the linstock; 15 turns the limber. This is only done with light pieces.

Prepare for Action.—7 and 8 unhook; 9 and 10 quit their pins; 12 and 13 carry back the drag ropes to 14; 14 gets his ammunition; 15 turns the limber to the front; the whole resume their places in action.

9. Prepare to retreat with a Horse.

Light Pieces.—7, 8, 9, and 10 place themselves as in retreating slow; 13 gets a drag rope from 14, and gives it to 9 and 10, who lay the center of it across the top of the traversing handspike, and then under the trail hooks; 12 and 13 hook the traces of the horse brought up by the driver to the ends of the drag rope; 15 turns the limber.

Heavy Guns.—This is done in the same manner, but with two horses; 9 and 10 hook on the rear horse, and 12 and 13 the leader.

Prepare for Action.—The same numbers undo what they have just done.

10. Prepare to retreat with a Limber.

The limber is brought up to the trail of the carriage; 12 and 13 bring up each a drag rope, and hook the chain ends to the limber; while 9 and 10 hook the other ends to the trail hooks.

11. Prepare to fire retreating with a Horse.

This is done exactly as in the article Retreating with a Horse, except that two drag ropes are brought by 12 and 13, who hook the chain ends to the horses traces, while 9 and 10 hook the other ends to the trail hooks.

12. Prepare to fire retreating with a Limber.

The limber in this case is fixed exactly as in retreating with a limber; but at the distance of two drag ropes length: this therefore employs two pair of drag ropes. In firing and retreating, if the gun retreat loaded, 10 is not to light his port fire, nor 11 to point till ordered. Upon the word Halt, Nᵒ 7 must ram home the cartridge, and the whole face about. In preparing for action from any of these positions, the same numbers undo exactly what they have just done, and immediately fall into their places for action; and the duties are the same with the heavy field pieces as with the light ones.

Exercise of a Field Gun with 15 Men.

When a light gun has 6 drag rope men attached to it, the duties of the standing numbers, that is, the numbers from 7 to 15 continue the same in all the exercises just mentioned; but they assist also in the movements of the gun by drag ropes.

In the line of march, 1, 2, and 3, are on the left of the gun in the rear of 7; and 4, 5, and 6 on the right, in the rear of 8.

In the position for action, 1, 2, and 3, hold the right drag rope, and 4, 5, and 6 the left, and dress in a line with the axletree. On the word Load, 3 and 4 unhook the drag ropes from the drag washers, 3 holds the hook in his left hand, and 4 in his right; and they hook on again at the word Cease firing.

On the word Prepare to advance quick, 2, 3, 4, and 5, slip under the drag ropes; 2 and 5 man the loop ends on the inside; 3. and 4 the first pins on the inside; 7 and 8 move to the second pins on the inside; 1 and 6 remain at their pins: 9 and 10 move to the second pins on the outside; and 12 and 13 to the rear pins on the outside; 14 assists 11 at the traversing handspike; 13 lifts up the trail for 11 to put in the truck; and 12 gives his match to 10.—Then the word,

Prepare for Action.

2, 3, 4, and 5, slip back again under the drag ropes, and the whole resume their places for action.

Word—With two pair of Drag Ropes,

prepare to retreat quick.

3 and 4 unhook from the drag washers, and march to the rear; 2 and 5 follow, and 1 and 6 hook the loop ends of the drag ropes to the trail hooks. 12 sticks his linstock in the ground, and with 13 brings the spare drag ropes from 14, and gives the chain ends to 7 and 8 to hook to the drag washers; 7, 9, and 12, man the right drag rope, and 8, 10, and 13, the left. To resume the position for action, on the

Word—Prepare for Action.

7 and 8 unhook the spare drag ropes, and 12 and 13 carry them back to 14; 1 and 6 unhook from the trail, and 3 and 4 hook the other ends to the drag washers.

Word—Prepare for Action retreating.

The drag rope men change as in retreating. Upon the word Load, 1 and 6 unhook from the trail, and hook on again at the word Cease firing.

It must be here remarked, that in the exercise with 15 men, only the additional duties have been detailed; the duties of the standing numbers in action, advancing or retreating, being still the same as without drag rope men. In limbering and unlimbering, the drag rope men have no duties, but are ready to assist with the drag ropes. The truck is always put on in all movements with the drag ropes, and thrown off at the word Load.

Exercise with Heavy Ordnance in a Battery.

32, or 42 Pounder.

10 Men.

9 Men.

1 spunges; 2 loads.

1 spunges, 2 loads.

3 and 5 run the gun up.

3 and 5 run up.

4 and 6 run up and elevate.

4 runs up and elevates.

7 serves the vent, traverses,

primes and runs up.

6 brings cartridges, runs up,

and elevates.

8 runs up, traverses,

and fires.

7 serves the vent, runs up, traverses,

and primes.

9 brings cartridges.

8 runs up, traverses, and fires.

10 points and commands.

9 points and commands.

8 Men.

7 Men.

1 spunges; 2 loads and runs up.

1 spunges and runs up.

3 runs up.

2 loads and runs up.

4 and 5 run up and elevate.

3 runs up and elevates.

6 brings cartridges, runs up,

and traverses.

4 brings cartridges, runs up

and elevates.

7 serves the vent, runs up,

traverses, and primes.

5 serves the vent, runs up,

traverses, and primes.

8 points, fires, and commands.

6 runs up, traverses, and fires.

6 Men.

1 spunges and runs up,

2 loads, runs up, and elevates.

3 runs up and elevates.

4 brings cartridges, runs up

and traverses.

5 serves the vent, runs up,

traverses and primes.

6 runs up, points, fires,

and commands.

24 Pounder, &c.

8 Men.

7 Men.

1 spunges, 2 loads.

1 spunges, 2 loads.

3 and 4 run up and elevate.

3 runs up and elevates.

5 serves the vent, runs up,

traverses, and primes.

4 brings cartridges, runs up,

and elevates.

6 runs up, traverses, and fires.

5 serves vent, traverses, and primes.

7 brings cartridges.

6 runs up, traverses, and fires.

8 points and commands.

7 points and commands.

6 Men.

5 Men.

1 spunges, runs up, elevates.

1 spunges, runs up, elevates.

2 loads, runs up, and elevates.

2 brings cartridges, loads,

runs up, and elevates.

3 serves the vent, runs up,

traverses, and primes.

3 serves vent, runs up, traverses,

and primes.

4 runs up, traverses, fires.

4 runs up, traverses, fires.

5 brings cartridges.

5 points and commands.

6 points and commands.

4 Men.

3 Men.

1 spunges, runs up, points.

1 spunges, runs up, points, and fires.

2 brings cartridges, loads,

runs up and elevates.

2 brings cartridges, loads,

runs up, elevates, traverses.

3 serves vent, runs up, traverses,

elevates, and primes.

3 serves vent, runs up, elevates,

traverses, and primes.

4 runs up, traverses, fires.

4⅖, or 5½ Inch Mortar.

2 Men.

3 Men.

1 spunges, runs up, brings shells,

puts them in, traverses,

and primes.

1 spunges, runs up, traverses,

brings shells, and puts

them in.

2 serves the vent, runs up, brings

cartridges, puts them in, points,

and fires.

2 brings cartridges, puts in,

serves the vent, runs up,

primes, and fires.

3 points, elevates, and commands.

8 Inch Mortar,

or Howitzer.

5 Men.

4 Men.

1 spunges, runs up, dredges.

1 spunges, runs up, dredges.

2 runs up, brings cartridges

and puts them in.

2 runs up, brings cartridges,

and puts them in.

3 runs up, brings shells, puts

them in, traverses, primes.

3 serves the vent, brings shells,

and puts them in, runs up,

traverses, and fires.

4 runs up, traverses, fires.

4 runs up, points, commands.

5 serves vent, points, and commands.

10, or 13 Inch Mortar.

10 Men.

6 Men.

1 spunges, runs up, puts in shells,

and dredges.

1 spunges, runs up, puts in shells,

dredges, and traverses.

2 runs up, brings cartridges, puts

them in, and puts in the shells.

2 runs up, brings cartridges, and

puts them in, puts in shells,

and traverses.

3 brings cartridges.

3 and 4 run up, bring, shells,

and traverse.

4 and 5 bring shells.

5 runs up, serves vent, and primes.

6, 7, 8, and 9, run up, and traverse.

6 runs up, points, fires,

and commands.

8 serves vent and primes.

9 fires, 10 points, and commands.

Exercise of the Gin.

The complement of men for a gin is usually 1 noncommissioned officer and 10 men; they are numbered from 1 to 10, the noncommissioned officer being 11.

To carry a Gin.

1 and 2 carry the prypole, 3 and 5 the right cheek, 4 and 6 the left, 7 the windlass and fids, 8 and 9 the blocks and tackles, 10 the handspikes, &c.

To Set up a Gin.

1 and 2 put a common handspike through the ring, near the foot of the prypole, at which they lift; 3 and 4 steady the cheeks, by placing each a handspike against the lower cross bar; 5, 7, and 9 lift the right cheek; 6, 8, and 10 the left cheek; 11 gives directions. The tackles must be hooked on before the gin is raised.

To work a Gin.

1 and 3 man the right handspikes of the gin; 2 and 4 the left; 5, 6, 7, and 8 hold on the fall, and pull in the slack; 9 and 10 steady the gun, 9 at the muzzle, 10 at the breach. The tackle hook must be fixed directly over the dolphins, if any, or a little behind the trunnions.

In heaving, when the ends of 1 and 4 handspikes come as low as their knees, 2 and 3 put theirs into the upper holes of the windlass, and 3 gives the word Fetch, upon which 1 and 4 clear their handspikes from the windlass, and 1 gives the word Heave; 2 and 3 then bear down their handspikes, and remain fast till 1 and 4 having taken their fresh purchase, 1 gives the word Fetch, when 2 and 3 clear their handspikes, and 3 gives the word Heave; and so on alternately, till the gun is at its proper height, when the handspikes in the upper holes are made to rest against the upper cross bar, and 5 makes fast the fall to the lower cross bar; and if required to lower the gun, eases the fall off from the windlass; 5, 6, 7, and 8 move the carriage, as required, under the gun.

Exercise of the Sling Cart.

The men for the service of the sling cart are numbered from 1 to 7; the noncommissioned officer being No. 7; No. 1 and 2 sling the gun. The gun must be laid with 1 trunnion touching the ground, and the sling passes diagonally round the gun; being before one trunnion, and behind the other; and that end of the sling which goes round the lower side of the gun must be the end to be acted on by the windlass; as by that means the trunnions become horizontal when the gun is raised; No. 1, 3, and 5 man the right lever; 2, 4, and 6 the left lever; and upon the word from the noncommissioned officer they heave together: the noncommissioned officer then directs left hand lever hold on, right lever fetch; the right lever takes a fresh purchase: then, right lever hold on, left lever fetch; the left lever takes a fresh purchase; they then heave together again. When the gun is high enough, 7 puts in the pall; 1 and 2 take out the levers, and put in the prypole; 3 and 4 raise the breech of the gun with two common handspikes, and 5 and 6 lash it to the prypole: 1 and 2 then lay their levers along side the prypole, and 3 and 4 their handspikes on the top of them, which 5 and 6 lash all fast together.

F ASCINES—have different names, according to their size and use.

1. Saucissons are usually made 18 feet long, and from 10 to 12 inches in diameter; and are used for the revetement of embrazures, or for the corners of the parapet.

2. Battery Fascines—are made from 8 to 12 feet long, and from 10 to 12 inches thick; used for the revetement of the parapet, &c.

3. Trench Fascines—from 4 to 6 feet long, and from 4 to 9 inches thick; used at sieges.

4. Water Fascines—6 feet long, from 1 to 2 feet thick; used to cover marshy and wet situations; they must be loaded with stone to make them sink.

5. Covering Fascines—are used to form the tops of magazines or saps. They ought therefore to be composed of the strongest branches, with the addition of a few poles, that they may bear a considerable weight.

6. Sap Faggots—3 feet long, 8 inches thick.

Attentions in making Fascines—The bands must be from 10 to 12 inches asunder, of birch, hazle, or other pliant wood, well twisted. The fascines must be drawn close with a choke rope, previous to being tied.

In laying the wood to form the fascines, the shortest and smallest pieces should be laid inside. Three men are usually employed at each trestle, with two to collect the stuff.

In general a saucisson of 18 feet may be finished at each trestle in half an hour.

Birch and fir are the bell woods for this work.

Fascines are sometimes bent so as to coincide with the angles of the battery. The Prussians double some of the fascine stuff, so as to make a loop at the end of the fascine, which being laid over one another at the corners, and a stake driven through the loops, are very strong.

FIRE SHIP. —Proportion of combustible Stores for a Fire Ship of 150 Tons.

Nᵒ.

Fire barrels, filled with composition

8

Iron chambers, to blow open the ports

12

Composition for priming,

barrels

3½

Quick, match,

”

1

Curtains,

dipped

48

Reeds,

long,

single dipped

150

”

short,

double dipped

75

single dipped

75

Bavins,

single dipped

250

The fire barrels are about 2 feet 4 inches high, and 1 foot 6 inches diameter. Each barrel must have four holes of about 6 inches square cut in its sides; and these holes must have a square piece of canvass nailed over them quite close. They are then filled with the same composition as for carcasses, and 4 plugs of about 1 inch diameter and 3 inches long, and well greased, are thrust into the top, and then left to dry. When dry, these plugs are taken out, and the holes driven with fuze composition, and quick match at the top; which goes from one hole to the other: after this the top is smeared over with mealed powder mixt up with spirits of wine. When dry again, a sheet or two of brown paper is laid over the top, and then one of the canvass covers, which is made secure by the upper hoop of the barrel.

Composition for dipping Reeds,

Bavins, and Curtains.

lbs.

Rosin

120

Coarse sulphur

90

Swedish pitch

60

Tallow

6

Mealed powder

12

This proportion will dip about 100 reeds and 25 bavins.

Each curtain contains 1 square yard of barras.

Each cover for fire barrels 1 do. of sacking.

Immediately that the curtains, covers, &c. are dipped, they are to be strewed over with fine brimstone, before the composition grows cold.

The iron chambers, for blowing open the ports, hold from 9 to 11 ounces of powder. They are fixed in such a manner as to prevent their recoil, and to ensure the ports being blown open. The vents are generally corked up, and covered with a piece of barras, till required to be primed.

To fit out a Fire Ship.—The whole breadth of the fire room is to be divided into 9 parts, and troughs laid the whole length of the room. Cross troughs, of communication are laid between them, about 20 in each row, perpendicular to the long troughs. These troughs are usually 4 inches wide, and 4 deep. There are two fire trunks and two fire scuttles on each side, under which the eight fire barrels are to be placed.

The reeds and bavins are to be tied down in the troughs. The curtains are to be nailed up to the beams, equally through the fire room. The ship is not to be primed when fitted out, but only when intended to be fired.

To Prime.

Composition for Priming.

Saltpetre pulverized

22 lbs.

8 oz.

Rosin

2

11

Sulphur

18

—

Mealed powder

45

—

Linseed oil

1 pint.

All the reeds and bavins are to be taken up, and a little of the above composition sprinkled in the bottom of the troughs; the reeds, &c. to be then gently tied down again. Quick match of 6 or 8 threads doubled must be laid along on the tops of all the reeds &c. and the priming composition strewed over it, and over all the fire room. The covers of all the fire barrels must be cut open, and made to hang down on the sides of the barrels. Leaders of strong quick match must be laid from the reeds to the barrels and to the chambers; and must be tied down to the vents to insure its not falling off. Strong leaders of quick match; 4 or 5 times doubled, must be laid from the reeds to the sally ports; and the sally ports must be connected by quick match, that the whole may take fire at once.

The following method is now adopted of producing an external fire, in addition to the internal fire, before gained by the fire room.

Fire boxes filled with the carcass composition, are distributed in the following manner, in a ship of three masts:

1

Suspended from each of the catheads and davits,

4

on each side the bow

8

Slung across the bowsprit

8

4

Across each of the outriggers abaft

8

2

From the graplins of each of the

12

lower yardarms

1

From the deadeyes on each side of the

6

three round tops

1

From the middle of the inside of the main, fore,

6

and mizen shrouds

44

The boxes are suspended by chains and hooks, and those slung across the bowsprit and outriggers, are fixed by staples. The two inner ones are laid with leaders of quick match, which fire instantly, or with portfires, which burn a given time; they communicate with the outer ones by reeds, which are tied down on the bowsprit and outriggers. The boxes hanging from the deadeyes and shrouds, are fired by curtains suspended from the shrouds, the lower one of which hangs immediately over one of the large fire barrels. The two boxes on each yardarm are hung one over the other; the upper one having a leader of quick match carried along the yard from the shrouds; and in burning will no doubt fire the lower one. Besides the boxes, there are fire barrels arranged as follows; 2 half barrels on the forecastle; 2 abaft the main deck, and 4 on the main deck; 2 in each roundtop, placed against the masts; and 4 large fire barrels under fire trunks, to convey fire to the curtains on the shrouds. All these fire barrels and boxes are to be fired by separate leaders of quick match or portfire, in order that any part of the ship may be fired to cover its approach by the smoke; and the remaining part instantaneously upon quitting the ship. It has been found by experiment, that two men with lighted portfires can set fire to the whole of the leaders on the deck, bowsprit, catheads, outriggers, &c. in less than a minute; therefore the risk of trusting to one main leader to the whole, may be avoided.

The leaders are laid in painted canvass hose made for the purpose.

FLINTS—are usually packed in half barrels.

Weight.

Qrs.

lbs.

One half barrel contains

Musquet,

2000

2

14

Carbine,

3000

2

10

Pistol,

4000

2

15

The most transparent and free from veins are esteemed the best flints.

cwts.

qrs.

28 kegs of

musquet

flints

take

18

0

in tonnage

10 kegs of

pistol

”

”

3

2

”

FORTIFICATION.—Practical Maxims in building Field Works.

1st. The spot on which works are to be constructed should determine their figure; nor should any attention be paid to preserve a regular form which does not occupy the ground to advantage.

2d. Every line must be so disposed, that the slope of hills all around even to the very bottom, be open to the small arms of the garrison; and every part should be discoverable to the distance of at least 500 paces.

3d. Works thrown up for the defence of a defile, should always be within musquet shot of it, which must not be more than 200 yards.

4th. The best defence in works that are flanked, or where one side is defended by the fire of another, is that formed by right angles.

5th. A salient angle should never be less than 60, and a re-entering angle than 90 degrees; nor greater than 120 degrees.

6th. The entrance to the work should always be made in the part least exposed to attack, and if possible in a re-entering angle.

7th Endeavor to present, if possible, a larger front to the enemy than he can occupy in making the attack.

8th. Avoid all ground commanded by an eminence, either in front, flank, or rear.

9th. Never leave the rear of a work so exposed that the enemy may turn it.

10th. Always make the angles of a work in the directions least exposed to attacks, and consequently always present a front to the most exposed.

11th. The garrison should never be drawn up more than two deep; and an ordinary pace of two feet is usually allowed for each file, and from 6 to 8 paces from each piece of ordnance.

12th. If a work is so large as to be defended by a battalion or two, a reserve should be allowed of about one sixth of the number.

13th. The space within a work should always be sufficient for the men to move and lie down. Every soldier will require at least 18 square feet, and every field gun at least 216 square feet.

14th. Provided the line is not made too extensive, the more inward space there is the better.

15th. A parapet to resist cannon shot should never be less than 12 feet thick; and for musquet shot not less than 6 feet.

16th. The height of the parapet must be regulated by the situation of the work, and of the adjoining ground; with this consideration, that its height above the banquette does not exceed 4½ feet.

17th. The depth and breadth of the ditch must be regulated by the quantity of earth required, for the parapet and banquette.

18th. A tete de pont, or work to cover the embarkation of troops, or the passage of a river, should, if possible, be made where the line of the river or coast forms a kind of re-entering angle; that the flanks of the corps, as well as those of the works, may be covered.

To carry on the Work.—The number of workmen must be proportioned to the time allotted for carrying on the work, the quantity of labour, and the number of hands capable of being employed at the same time. When the ditches are broad, the workmen may be posted in two rows; but if narrow, only in one. In the first case, the earth will be thrown by those who are on the outward edge of the ditch to the second row, and by them upon the parapet; for which reason the second row, to keep pace with the first, ought to be twice as numerous. The workmen should never be placed nearer than 2 paces, or 4 feet, from each other; and two men with shovels should be preceded by one with a pickaxe. If more than usual expedition be required, one man with a wheel barrow, or basket, may be added to six or eight with shovels. Another row of workmen should also be placed upon the parapet, to spread the earth and beat it down, as it is thrown up.

In fixing the fascines, three men will be sufficient for every 24 feet of the work, who should be provided with two mallets, a saw, and a handbill, or hatchet.

In order to form some idea of the time in which a field work may be completed, compute the number of cubic feet of earth to be excavated, thus; multiply half the sum of the breadth of the ditch at top and at bottom, by the depth, for the number of square feet in the profile; and this multiplied by the distance between the workmen in feet, will give the number of cubic feet each man has to dig: or being multiplied by the length of the ditch, gives the cubic contents of the ditch. Now, one man is supposed to be able to move 216 cubic feet of earth in a day, during the summer; but this is not always the case. If a field work be completed in 24 hours, it will be as much as the most diligent workmen are capable of. This time is generally allowed for the formation of a weak profile; 48 hours for that of a stronger, with a revetement of fascines; and 72 for the strongest.

The different slopes for the works must depend upon the nature of the soil, and the materials of which the work is composed. The interior slope of the parapet, though it be fascined, should be ⅙ of its height; exterior about ⅔ its height. The slope of the banquette equal to its height. The slope of the scarpe or counterscarpe of the ditch, should be from half its height to its full height, according to the soil. The superior slope of the parapet must entirely depend upon the situation of the work, and that of the surrounding country. The interior slope of the parapet is generally lined with fascines, to keep up the earth; but it is not absolutely necessary to fascine the exterior slope, if the soil be pretty stiff. The embrazures are generally made 20 inches wide on the inside, and 9 feet on the outside; they must always be lined with something to retain the earth; turf is generally preferred, as fascines are so apt to take fire.

The manner of making the materials for field works, may be seen under the heads Fascines, Gabions, Hurdles, &c. and the manner of estimating the quantity of materials for works of this kind, may be seen under the word Battery.

Fortification—Permanent.

A parapet, to resist cannon, should never be less than 18 feet thick in earth, and 8 or 9 in masonry. A wall need only be two feet thick in masonry, to resist musquetry. The parapet should always be 4½ feet above the banquette, and 7½ or 8 feet above the rampart, or terre plein.

The Rampart should always be sufficiently wide to allow for the platform, and for two carriages passing each other; about 9 fathoms at top. A parapet of earth, though it takes more room, is always preferable to one of masonry, when it can be raised; though the only objection to the masonry is the number of splinters it produces.

Entire Revetements of masonry are not advantageous for the same reason. The masonry of revetements should not be so high as to be seen or battered from a distance: earth parapets are battered in vain, as the earth forms a natural slope.

The best Escarpe is made of masonry, either in wet or dry ditches, be the earthen one ever so well fraized or palissaded. The earthen one may be stormed without making a breach. The escarpe should be 30 or 35 feet high.

The Counterscarpe should also be of masonry, and not less than 12 feet high. The inconveniences of an earth or low counterscarpe, are the impossibility of defending to the last the covert way; as the enemy may descend into the ditch, and again mount the covert way, and so get in the rear of the traverses. The enemy may find his way along the natural slope of an earth counterscarpe, and is not delayed by a tedious operation of getting into the ditch. Besides, the natural slope of the end of an earth traverse prevents its effectually covering the covert way.

Ditches are generally 15 or 18 toises wide. Dry ditches are always preferable to wet ones, on account of the shelter they afford the troops, and the ready communication with the outworks, without the constant trouble and danger of bridges.

The Covert way should be 5 toises wide; less would crowd the troops, and more would allow room for the enemy to erect batteries in it.

The whole of the glacis should be seen, not only from the crest of the parapet, but from the embrazures in the parapet.

The Tenaile, must not be so high as to prevent the flank guns in one bastion seeing the breach that may be made in the collateral one.

Ravelins are best without flanks; their faces directed to 10 toises from the shoulders of the bastions.

The crest of the parapet of the body of the place should be 8 feet above the crest of the glacis, to command it across a ditch of 15 or 20 toises.

The crest of the parapet of the ravelin is 3 feet lower than that of the body of the place, in order that it may be more effectually commanded from the place; and therefore to enable the parapet of the ravelin to command its own glacis, the ditch is only made 10 toises, and this glacis is a foot lower than that of the body of the place.

There must be an equilibrium of defence established through every front of a fortified place; for it will be needless to strengthen any particular front, if the others from their weakness be left exposed. The following remarks may enable an observer to appreciate the value of particular works, in the proper application and arrangement of which that equilibrium consists.

Intrenchments within the works add much to their defence. In large bastions with obtuse flanked angles, the best intrenchment is formed of the front of a fortification, or of two demi bastions and a curtain, connecting the angles formed by the flank and curtain. If this intrenchment be advanced to the shoulders of the bastion, so as to include its flanks, as is often the case, it will be subject to be taken in the rear, by the fire from the counter batteries opposed to the flanks. But in bastions with acute flanked angles, which do not afford sufficient space for this kind of intrenchment, Cormontaigne proposes one in the form of a cavalier, whose faces and flanks are parallel to those of the bastion. The first kind of intrenchment does not operate in the defence of the place, till after the passage of the ditch; till which time it remains entire, and then capable of a very great defence. The second kind becomes a support to the bastion from the first commencement of the siege; but it is therefore subject to have its defences destroyed at a distance. Nor is its defence equal to that of the other form.

Counterguards should possess the three following properties: 1st. They must cover effectually the principal work before which they are placed; at least that part of it, which can be battered in breach. 2d. They must be lower than the work which they cover; but not so low as to permit its revetement to be seen. 3d. They must be so narrow as not to afford room for the besiegers to erect batteries in them, against the work which they cover, and therefore not leave the besiegers a choice of positions. The counterguards in Coehorn’s system are only of earth, through which it is necessary to make an opening, before the capital work can be battered.

Horn or Crown Works, unless to occupy some important point, to strengthen some weak side, or to afford more room for a confined garrison, are rather a weak than a strong arm to a place. This is particularly the case when they are constructed with smaller, and consequently weaker fronts, than that part of the body of the place which they cover; as they facilitate, when taken, the approaches to the body of the place. This is remedied by constructing their fronts of the same strength as the front or fronts which they cover. They also facilitate the taking of the place, by exposing the revetement of the work on which their branches are directed, to be battered in breach, along the ditches of those branches. This is a great evil, even to an outwork, but is of serious consequence if they rest upon the body of the place. This defect has been remedied by placing these works altogether outside of the covert way, and allowing their ditch no communication with those in the rear. In this case their gorge must be made very secure to prevent its being turned.

An Advanced Covert way, is esteemed amongst the best means of adding to the defence of places. Besides the advantages common to the usual covert way, it has many peculiar to itself. It however seems necessary to ensure to it the many advantages of which it is susceptible, (beside being properly palissaded,) that it should be secured in the rear by a wet ditch, as the only means of giving it an inaccessible counterscarpe, and at the same time keeping it under the fire of the musquetry of the place. This kind of covert way is generally supported by redoubts upon the capitals of the bastions and ravelins; which from their position cannot mask the fire of the place; and being mounted with artillery, oblige the besiegers to commence their attack at a great distance, and very much to extend their operations; and as their establishment upon this covert way must effectually mask the fire of their first batteries, it must greatly increase their labour. The retreat from these redoubts must be secured by an underground passage.

Countermines are undoubtedly one of the first means of strengthening places. For this article we refer to the word Mines.

Detached Redoubts, when circumstances of situation favour them, are employed with great success. They are usually detached and totally unconnected with any of the works of the place, by any covert way or other aboveground work; and have for objects, either the opposing an additional obstacle to the besiegers at the point they occupy, or the rendering the adjoining fronts inaccessible, by an enfilade or reverse fire upon the approaches. They also afford at their gorge, a most excellent rendezvous and retreat for sorties; upon the level of the country, and without the difficulty of filing troops through the barrier of a covert way.

But in order to insure to the detached work or works, all these advantages, it is necessary that they should be either totally inaccessible to the besiegers, by reason of the natural difficulties of their situation, as in an inundation, morass, &c. or be made secure by art, from being taken by storm, and only attackable by regular approaches. They should be under cover of the fire of the place; but if their distance be too great for that, an intermediate work must be established to give them support. Their best form is that of a bastion with retired flanks; and a strong system of countermines the most effectual way of prolonging their resistance.

General Remarks.—The larger the flanked angles of works, the more direct will be their fire, and that of their covert way, upon the approaches; the greater extent will they oblige the besiegers to occupy in their parallels and batteries; and the more will they oblige the besiegers to expose themselves to the fire of the fronts collateral to the one attacked. Faces of works directed to inaccessible situations, such as rivers, lakes, &c. from whence they cannot be enfiladed by ricochet batteries, add greatly to the strength of a front.

If the flanked angle of a ravelin be so advanced as to see in reverse any battery erected upon the crest of the glacis, or in the covert way of the bastions, it will increase the strength of that front; because it will oblige the besiegers to gain possession of the ravelin, before they can make any lodgement, from which they can batter the bastions. This is the case in Cormontaigne’s system: and a place thus fortified, obliges the besiegers to attack and gain two ravelins, to get at the bastion between them. Beside, if this system be applied to a right line, or to a polygon of many sides, the prolongations of the faces of the bastions, will be intercepted by the flanked angle of the ravelins, and consequently make the establishment of enfilading batteries against them very difficult. A work which admits of a breach being made in it (particularly the body of the place) at a distance, very much facilitates its being taken. The ditch of the ravelin affords an opening through which the besiegers may make a breach in the face of the bastion, from the glacis, opposite the flanked angle of the ravelin, and is therefore subject to this defect. A counterguard before the bastion, lessens this evil, by transferring the breach from the body of the place to the ravelin; but it requires a counterguard also before the ravelin, effectually to cure it. A crown or horn work also produces this evil; its remedy was given, in speaking of those works.

The direction of the flanks or faces of a work is not so material as relating to the fire of artillery, as to that of musquetry; for artillery is never fired without being pointed, but musquetry is fired mechanically, and perpendicular to the parapet, without much attention to the object to be struck.

A work in the neighbourhood of a height must be defiladed[7] from that height, that is, instead of being built upon a horizontal plane, it must be erected upon an imaginary inclined plane, passing from somewhere in the interior of that work, over the most commanding points of the height: and every part of the works must bear the same relation to this inclined plane, that they would do, to a horizontal plane in a level country.

A work is not therefore always to be condemned, because it is in the neighbourhood of a height; for if it be properly defiladed from that height, it will receive a great advantage over the approaches of the besiegers, carried on down an inclined plane towards it. But a work to be properly constructed in the neighbourhood of heights, must not uniformly preserve the same distance from those heights, unless their summits be all upon the same level; but must approach them at their lowest parts, and recede from them as they rise; thus will the necessary plane of defilement preserve nearly the same degree of obliquity throughout.

The Dimensions in the following Table of Vauban,

are thus applied:

The Fort is mostly for squares.

The Little for citadels, commonly pentagons.

The Mean for all fortifications from the hexagon and upwards.

The Great is seldom used but in irregular fortifications, and particularly on rivers.

Principal Dimensions of Fortifications,

according to VAUBAN.

Side of

Polygon

Length of

Perpendicular

Faces of

Bastions

Capital of

Ravelins

Forts.

80

10

22

25

90

12

25

28

100

12½

28

30

110

14

30

35

120

15

33

38

130

16

35

40

Little

Fortification.

140

20

40

45

150

21

42

50

160

23

45

50

170

25

47

52

Mean

180

30

50

55

190

31

53

55

Great.

200

25

55

60

260

22

60

50

Dimensions of Walls and their Counterforts, from

10 to 50 Feet high, having a Slope of ⅕ their Height.

Wall.

Counterforts.

Height.

Thickness

at Top.

Thickness

at Bottom.

Distance

between

them.

Breadth.

Length.

Feet.

Feet.

Inch.

Feet.

Inch.

Feet.

Feet.

Inch.

Feet.

Inch.

10

4

0

6

0

8

2

8

4

—

15

4

3

7

3

10

3

4

5

—

20

4

6

8

6

12

4

0

6

—

25

4

9

9

9

14

4

8

7

—

30

5

0

11

0

16

5

4

8

—

35

5

3

12

3

18

6

0

9

—

40

5

6

13

6

20

6

8

10

—

45

5

9

14

9

22

7

14

11

—

50

6

0

16

0

24

8

0

12

—

The heights in the above table are taken only from the bottom of the ditch, and do not include the foundations.

When the rampart is partly walled and partly turfed; then ⅕ of the height of the turfed part must be added to the breadth of the wall at the top given in the table.

The bases of all inward slopes of earth should be equal to their height, if not more.

The bases of all outward slopes of earth ⅔ of their height.

The superior slopes of all parapets ⅙ of their breadth.

The slope of all walls, or revetement ⅕ of their height.

Though the above principles given for the erection of field works may assist an officer’s recollection who may be employed on that duty, the memorandums given respecting permanent fortification pretend to no such object: but may serve to remind an officer, if he should visit a fortification, of its essential requisites; and may assist his observations in passing round the works.

FUZES.—Composition.

Saltpetre

3 lbs.

4 oz.

Sulphur

1

—

Mealed powder

2

12

Nature.

Fuze Diameter.

Composition.

Drove by one

man in 1 day.

below

the cup.

at the

bottom.

at the

cup.

Diameter.

Length.

Time it

burns.

Inches.

Inch

Inches.

Inches.

Inch.

Inches.

″

Nᵒ.

13

2.1

1.575

2.49

.5

8.4

35

25

10

1.8

1.35

2.13

.438

7.2

33

25

8

1.3

1.25

1.78

.375

6.37

29

30

5½

1.1

.825

1.3

.275

4.4

18

50

4⅖

1.0

.75

1.18

.25

3.5

15

700

Grenades

0.8

.6

.9

.2

2.25

1000

Diameter inside the cup is 3 diameters of the bore.

Depth of the cup             1½ do.

Thickness of wood at bottom of the bore, 2 diameters.

To find the Length of Fuzes for any Range.

The 13 and 10 inch fuzes of the same length burn so nearly equal, that one common length answers both, as do the 8 inch, 5½ and 4⅖. Therefore, to find the length of fuze for any range, multiply the time of flight by .22 for the 13 and 10 inch, and by .24 for the 8, 5½, and 4⅖; which is the decimal part of an inch a fuze burns in a second. Fuzes are thought to keep better by being painted; and for field service, are often marked off by black lines into seconds and ½ seconds.

G ABIONS—Small gabions of 3 feet high, and 2 feet diameter, are made with least trouble, and are easiest carried. The pickets for them must be 1½ or 2 inches thick, and 4 feet long. Large gabions are 6 feet high, and 3 feet in diameter; and require two men to carry them. The smallest gabions or baskets are formed of pickets, 1 inch in thickness, and 1 foot long: they are 12 inches in diameter at top, and 10 at bottom. The small gabions have 7 or 8 pickets, the large ones 9 or 10.

To make them.—The pickets are first to be fixed in the ground in a circle, the size of the bottom of the intended gabion; then a few twigs are to be wove through the upper ends, to keep them from flying out; afterwards the work must be begun at the bottom and continued upwards; and the whole being well driven down with a mallet, the edges must be secured by twigs, wattled up and down. The twigs of willow, birch, hazle, alder, poplar, and beech are proper for this purpose. The top of the gabion must be made very even, because that becomes the bottom when finished. Four men are usually employed on each gabion, with a billhook, a mallet, a spade, and two axes. Two collect the wood, while the other two form the gabion. A 3 foot gabion ought to be made in half an hour.

GIN Triangle.—Length of arms of the gin 16 feet 4½ inches. Roller, 6 feet long. Tackle fall, 78 feet of 3 inch white rope. Sling, 6 inch white rope.

For the different exercises of the gin, see the word Exercise.

GRAVITY.—Table of the Specific Gravity of several Solid and Fluid Bodies.

Platina

23400

Nitre

1900

Fine gold

19640

Ivory

1825

Standard gold

18888

Brimstone

1810

Quicksilver

11325

Solid gunpowder

1745

Fine silver

11091

Sand

1520

Standard silver

10535

Coal

1250

Copper

9000

Boxwood

1030

Copper halfpence

8915

Sea water

1030

Gun metal

8784

Common water

1000

Cast brass

8000

Oak

925

Steel

7850

Gunpowder, close stacken

937

Iron

7645

”         in loose heap

836

Cast iron

7425

Ash

800

Tin

7320

Maple

755

Crystal glass

3150

Elm

600

Marble

2700

Fir

550

Common green glass

2600

Charcoal

Flint

2570

Cork

240

Common stone

2520

Air

1.232

Clay

2160

Brick

2000

Common earth

1984

The several sorts of wood are supposed dry.

This table also contains the weight of a cubic foot of each body in avoirdupois ounces; from whence results the following rules:

1. To find the Magnitude of any Body from its Weight.

As the tabular specific gravity of the body Is to its weight in avoirdupois ounces, So is one cubic foot, or 1728 cubic inches, To its content in feet or inches respectively.

2. To find the Weight of a Body from its Magnitude.

As one cubic foot, or 1728 cubic inches, Is to the content of the body, So is the tabular specific gravity To the weight of the body.

GRAPE SHOT.—See the word Shot.

GRANADES.—Hand granades may be thrown to the distance of 13 fathoms. For their dimensions, see the word Shell.

GUNNERY.—By the assistance of good tables of practice, and the tables of amplitudes, sines, tangents, and secants, all the cases in gunnery in a nonresisting medium may be easily solved; and perhaps the solution may be sufficiently correct for practice, if the initial velocity of the projectile be not so great as to make the air’s resistance considerable.

For the tables of ranges with ordnance, see the different natures, as Gun, Mortar, &c. and for the tables of amplitudes, sines, tangents, and secants, see pages 151 and 152.

Upon Horizontal Planes.

1. The greatest range is at 45° nearly.

2. The ranges with different elevations with the same charge, are as the double sines of the angles of elevation.

3. Any angle and its complement give the same range nearly.

4. The times of flight, are as the sines of the angles of elevation.

5. The altitude of the curve, at any elevation, is found by this proportion: as

Radius : tangent of angle of elevation ::

range

: altitude.

4

6. The time of flight at 45° is equal the square root of the range in feet, divided by 4, or more nearly

= √

quotient

²

of the range in feet, divided by 16.1, or the space passed through in the first second by gravity.

Having the first graze with a given elevation and charge, to determine the charge for any other first graze and elevation, multiply the known charge and elevation into the proposed first graze; also the proposed elevation into the known first graze, and divide the first product by the last, for the charge required.

Upon inclined Planes, at 45° Elevation.

Case 1st.

Given the charge and inclination of the plane,

to find the range.

Multiply the horizontal range with this given charge, (found in the tables of ranges) by the number found opposite the angle of inclination of the plane, in the first column of multipliers, in the table of amplitudes, under the head Ascents, if it be inclined above the horizon; and Descents, if below the horizon, for the range required.

Case 2d.

Given the range and inclination of the plane,

to find the charge.

Multiply the number found in the abovementioned table opposite the angle of inclination of the plane, in the second column of multipliers, under the head Ascents, or Descents, according as it is above or below the horizon, by the given range; for the range on a horizontal plane at 45°, the charge for which may be found from the tables of ranges.

Upon Inclined Planes,

at any Elevation.

There are always two elevations with which any range, (less than the greatest) may be made; and these elevations are always the complements of each other. The greatest range upon a horizontal plane is at 45°; or when the direction bisects the angle formed by the horizontal and vertical plane; also the greatest range upon any plane is made with that direction which bisects the angle between the plane and the zenith; and all other directions which make equal angles with this direction, (on each side of it) will also make equal ranges on the said plane; for the direction that bisects the angle between any plane and the zenith is the same with respect to that plane as the direction at 45° is with respect to the plane of the horizon.

Rules.—1st. The elevation which gives the greatest range on a given ascent, is equal to half the sum of 90° added to the ascent.

2d. The elevation which give equal ranges on a given ascent, are the complements of each other added to the ascent.

3d. The elevation which gives the greatest range on a descent, is equal to half the complement of the descent.

If the range and inclination be given, the least charge that will reach the object, may be found as follows: multiply the tangent of the proper elevation into the proposed range, for the horizontal range whose charge is required.

WILLIAMS’S Gunnery.

Table of Amplitudes.

Degrees.

Ascents.

Descents.

Multipliers.

Multipliers.

1st. cl.

2d. cl.

1st. cl.

2d. cl.

1

.983

1.02

1.02

.983

2

.966

1.03

1.04

.966

3

.949

1.06

1.05

.950

4

.932

1.07

1.07

.932

5

.916

1.09

1.09

.916

6

.900

1.11

1.11

.900

7

.884

1.13

1.13

.884

8

.868

1.15

1.15

.868

9

.852

1.18

1.17

.853

10

.836

1.20

1.19

.836

11

.821

1.22

1.22

.821

12

.805

1.24

1.24

.805

13

.789

1.27

1.27

.789

14

.774

1.29

1.29

.774

15

.758

1.32

1.31

.763

16

.742

1.35

1.34

.745

17

.726

1.38

1.37

.730

18

.711

1.40

1.39

.720

19

.693

1.45

1.42

.704

20

.677

1.48

1.45

.690

21

.660

1.52

1.46

.675

22

.643

1.56

1.52

.662

23

.625

1.60

1.55

.645

24

.607

1.64

1.58

.633

25

.589

1.70

1.62

.617

26

.570

1.76

1.66

.603

27

.550

1.82

1.69

.592

28

.530

1.86

1.73

.578

29

.510

1.96

1.78

.562

30

.488

2.05

1.82

.549

31

.466

2.14

1.87

.534

32

.442

2.26

1.92

.526

33

.418

2.41

1.97

.508

34

.393

2.55

2.02

.495

35

.366

2.73

2.08

.488

36

.338

2.96

2.13

.470

37

.309

3.24

2.20

.455

38

.278

3.60

2.26

.443

39

.245

4.09

2.33

.430

40

.210

4.80

2.40

.417

41

.173

5.78

2.48

.404

42

.134

7.46

2.56

.390

43

.092

10.90

2.64

.380

44

.045

22.22

2.73

.370

45

.000

infinite

2.83

.360

Table of Natural Sines, Tangents, and Secants.

Degrees.

Sines.

Tangents.

Secants.

1

.018

.018

1.000

2

.035

.035

1.000

3

.052

.052

1.001

4

.070

.070

1.002

5

.087

.087

1.004

6

.105

.105

1.006

7

.122

.123

1.008

8

.139

.141

1.010

9

.156

.158

1.012

10

.174

.176

1.015

11

.191

.194

1.019

12

.208

.213

1.022

13

.225

.231

1.026

14

.242

.249

1.031

15

.259

.268

1.035

16

.276

.287

1.040

17

.292

.306

1.046

18

.309

.325

1.051

19

.326

.344

1.058

20

.342

.364

1.064

21

.358

.384

1.071

22

.375

.404

1.079

23

.391

.424

1.086

24

.407

.445

1.095

25

.423

.466

1.103

26

.438

.488

1.112

27

.454

.510

1.122

28

.469

.532

1.133

29

.485

.554

1.143

30

.500

.577

1.155

31

.515

.601

1.167

32

.530

.625

1.179

33

.545

.649

1.192

34

.559

.675

1.206

35

.574

.700

1.221

36

.588

.727

1.236

37

.602

.754

1.252

38

.616

.781

1.269

39

.629

.810

1.287

40

.643

.839

1.305

41

.656

.869

1.325

42

.669

.900

1.346

43

.682

.933

1.367

44

.695

.966

1.390

45

.707

1.000

1.414

46

.719

1.036

1.440

47

.731

1.072

1.466

48

.743

1.111

1.494

49

.755

1.150

1.524

50

.766

1.192

1.556

51

.777

1.235

1.589

52

.788

1.280

1.624

53

.799

1.327

1.662

54

.809

1.376

1.701

55

.819

1.428

1.743

56

.829

1.483

1.788

57

.839

1.540

1.836

58

.848

1.600

1.887

59

.857

1.664

1.942

60

.866

1.732

2.000

61

.875

1.804

2.063

62

.883

1.881

2.130

63

.891

1.963

2.203

64

.899

2.050

2.281

65

.906

2.145

2.366

66

.914

2.246

2.459

67

.921

2.356

2.559

68

.927

2.475

2.669

69

.934

2.605

2.790

70

.940

2.747

2.924

71

.946

2.904

3.072

72

.951

3.078

3.236

73

.956

3.271

3.420

74

.961

3.487

3.628

75

.966

3.732

3.864

76

.970

4.011

4.134

77

.974

4.331

4.445

78

.978

4.705

4.810

79

.982

5.145

5.241

80

.985

5.671

5.759

81

.988

6.314

6.392

82

.990

7.115

7.185

83

.993

8.144

8.206

84

.995

9.514

9.567

85

.996

11.430

11.474

86

.998

14.301

14.336

87

.999

19.081

19.107

88

.999

28.636

28.654

89

.999

57.290

57.299

90

1.000

infinite

——

GUNS.—Calibers of English and Foreign Guns, expressed in English Inches.

English.

French.

Spanish

Dutch.

Russian.

Portug.

Pr.

Inch.

Pr.

Inch.

Pr.

Inch.

Pr.

Inch.

Pr.

Inch.

Pr.

Inch.

42

7.018

—

—

—

—

—

—

36

6.86

48

7.49

32

6.41

36

6.9

36

6.84

32

6.4

30

6.47

36

6.8

24

5.823

24

6.03

24

6.03

24

5.92

24

6.

24

5.93

18

5.292

16

5.26

18

5.52

18

5.45

18

5.45

18

5.4

12

4.623

12

4.78

12

4.8

12

4.76

12

4.76

12

4.7

9

4.200

8

4.18

9

4.2

8

4.13

8

4.17

9

4.3

6

3.668

—

—

—

—

6

3.78

6

3.78

6

3.75

4

3.204

4

3.315

—

—

—

—

—

—

—

—

3

3.913

—

—

—

—

—

—

—

—

—

—

1

2.019

—

—

—

—

—

—

—

—

—

—

Length and Width of English Brass Guns.

Nature.

Length in

Weight.

Calib’rs.

Ft.

In.

Ct.

qrs.

lbs.

42

Pounders

16.244

9

6

66

—

—

32

”

18.721

10

0

55

2

—

24

Heavy

19.574

9

6

53

0

9

Medium

16.483

8

0

41

3

2

Light

10.302

5

0

16

3

13

” new

13.000

6

3

16

3

13

18

Light ”

13.000

5

9

18

0

—

12

Heavy

24.659

9

0

31

2

8

Gen. Desagulier’s

19.468

7

6

22

1

21

Medium, old

16.872

6

6

21

3

—

Medium, new‡

16.872

6

6

18

—

—

Light

12.978

5

0

8

3

4

” new‡

13.000

5

0

12

—

—

6

Heavy

26.112

8

0

19

1

6

Gen. Desag. Med.‡

22.876

7

0

12

—

24

Med. new

18.500

6

0

8

3

27

”   reduced

17.000

5

6

8

0

22

General Belford’s‡

16.342

5

0

5

2

21

Light, common

14.706

4

6

5

—

18

3

Heavy

28.836

7

0

11

3

19

Gen. Desagulier’s‡

24.717

6

0

6

—

—

Light, common‡

14.418

3

6

2

2

27

Light infantry

12.358

3

0

1

3

16

General Pattison’s

12.358

3

0

1

2

19

1

Pr. Amuzette

29.7

5

0

2

2

12

Do.

35.6

6

0

3

0

11

Do.

41.5

7

0

3

1

12

Note. The guns marked (‡) are the only ones now used on general service.

Length and Weight of French Brass Guns, in their own Weights and Measures.

Nature.

Length in

Weight

Calibers.

Ft.

In.

Li.

lbs.

24

Prs.

Siege

—

9

11

5

5628

16

”

—

9

7

—

4111

12

”

Garrison

—

—

—

—

3184

8

”

—

—

—

—

2175

12

”

Field

18.0

6

6

—

1808

8

”

18.

5

8

—

1196

4

”

18.

4

6

—

590

1

”

—

—

—

—

266

Length and Weight of English Iron Guns.

Nature.

Length in

Weight

Proportion

between shot

and gun.[8]

Calibers.

Ft.

In.

Ct..

Qr..

42

Prs.

17.098

10

—

67

—

16.244

9

6

65

—

170

32

”

18.721

10

—

58

—

17.725

9

6

55

—

193

24

”

20.604

10

—

52

—

19.574

9

6

49

2

231

18.542

9

—

47

2

18

”

21.542

9

6

42

—

20.408

9

—

40

—

249

12

”

24.659

9

6

34

—

23.361

9

—

32

—

22.063

8

6

31

2

19.468

7

6

29

1

294

9

”

21.4

7

6

24

2

305

19.9

7

—

23

—

6

”

26.2

8

—

22

—

19.6

6

—

16

2

411

4

”

22.4

6

—

22

1

343

20.6

5

6

11

1

3

”

18.6

4

6

7

1

270

French Iron Guns, in English Weights, &c.

Nature.

Length in

Weight

Calibers.

Ft.

In.

Ct..

Qr..

lbs.

36

Pounders.

16.18

9

8

74

3

—

24

”

18.18

9

1½

51

—

—

16

”

21.01

9

7

42

—

—

18.45

8

4

43

2

—

16.92

7

8½

35

—

—

12

”

21.54

8

7

31

2

—

20.5

8

2

20

3

—

17.14

6

10

28

—

—

8

”

24.64

8

7

24

1

—

17.22

6

—

16

—

—

4

”

17.19

4

9

—

—

—

Ranges of Brass Guns, with one Shot. 1793.

Nature.

Charge

To the first graze of the Shot

P. B.

1°

2°

3°

4°

5°

lb.

oz.

Yds.

Yds.

Yds.

Yds.

Yds.

Yds.

24

Heavy

8

0

473

781

1032

1405

1585

1710

Medium

8

0

488

757

1103

1425

1557

1745

Light

3

0

162

364

606

722

1390

12

Heavy

Medium

4

0

705

973

1189

Light

3

0

601

816

1063

6

Desagulier’s

2

0

646

966

1325

6 Feet

2

0

683

948

1327

5 : 6 Medi.

2

0

775

1003

1444

5 : 6 Red’d.

2

0

642

976

1150

5 Feet

1

8

587

825

950

4 : 6 Feet

1

8

628

804

991

3

Desagulier’s

1

0

679

883

918

Ammuzette of 5 feet

0

8

604

800

”        of 7 feet

0

8

656

830

1000

Ranges from Brass Guns, with Two Shot. 1793.

Nature.

Charge

Elevation.

Medium first Graze.

lbs.

oz.

1°  30′

1st Shot.

2d Shot.

12 Pounder, Medium

4

—

1   30

607

706

6 : Desagulier’s

2

—

1   30

621

739

6 : of 5 feet

1

8

1   30

586

732

3 : Desagulier’s

1

—

1   30

523

638

Ranges from Brass Field Guns, with small Charges. 1798.

Nature.

Charge

First Graze with different Elevations.

Extreme Range.

1°

2°

3°

4°

5°

6°

7°

8°

12 Pr.

10 oz.

199

290

390

385

597

716

695

788

From  800 to 1000.

1 lb.

280

416

729

777

966

1090

1054

1295

From 1200 to 1500.

6 Pr.

5 oz.

111

222

376

432

618

625

650

788

From  800 to 1000.

8 oz.

277

401

754

826

925

980

1103

1100

From 1000 to 1300.

N. B. The above was a 12 Pr. Medium, and a 6 Pr. Desagulier’s.

The Distances are given in Yards.

Effects of Case Shot from a Battalion Gun.—Light 6 Pr. Length 5 feet—Weight 5 cwt. 3 qrs. 21 lbs. against a Target 8 feet high, and 90 feet long.

Distance

of

Target.

Nature

of

Charge.

Elevation.

Nᵒ. put into

the height of

6 feet, or the

height of

Infantry.

Nᵒ. put into

the height of

8 feet, or the

height of

Cavalry.

Yards.

Deg.

500

12 Balls, 8 oz. each,

1

3

3

3 in a tier,

1½

3

4

1¼ lb.powder.

2

3

4

400

Same Charge.

1

6

6

1½

4

5

2

4

5

300

Same Charge.

½

6

7

1

3

3

1½

4

6

400

34 Balls, 3 oz.each,

P. B.

10

12

7 in a tier,

½

9

10

1¼ lb. powder.

1

6

8

300

Same Charge.

P. B.

11

13

½

12

15

1

7

9

N. B. There were three rounds fired at each change, but they were all so nearly alike that it has been thought necessary to put down only one of them.—1802.

Ranges with Sea Service Iron Guns. 1796.

Nature of Guns 32, 24, and 18 Pounders.

Elevation.

Proportion

of powder.

Nature of Shot.

Range.

Deg.

Yards.

2

⅓

With single Shot to the first graze.

1200

2

¼

Do.         Do.

1000

2

¼

2 Shot, ranged close together, to

500

4

⅓

Single Shot

1600

4

¼

Do.

1500

7

⅓

Do.

2150

7

¼

Do.

2020

2

¼

One round shot, and 1 round of grape,

600

will range with effect together, to

4

¼

One round of grape shot, alone, to

1000

2

¼

One double headed, or bar shot,

800

will range to the first graze

Ranges with 5½ Inch Shells, from a 24 Pounder Iron Gun, Length of Gun 9½ Feet—Weight 49 ct. 26 lbs.

Elevation.

2 Pounds.

2 lbs. 8 oz.

3 Pounds.

Flight.

Range to

Flight.

Range to

Flight.

Range to

First

Graze.

Extreme.

First

Graze.

Extreme.

First

Graze.

Extreme.

Deg.

Sec.

Yards.

Yards.

Sec.

Yards.

Yards.

Sec.

Yards.

Yards.

1

1

213

1139

2¾

562

1456

1

277

1424

2

1¾

384

1267

1½

442

1413

1¾

526

1464

3

2¾

565

1413

2½

647

1553

2¼

740

1600

4

2¼

750

1479

3¾

896

1639

3½

880

1679

5

3¾

836

1670

4

915

1510

5

1182

1733

6

4

896

1495

5

1140

1657

6¼

1384

1787

7

6½

1180

1492

6

1205

1481

6¼

1410

1749

8

6¾

1305

1526

6½

1259

1544

7

1520

1744

9

7½

1329

1527

7

1341

1561

7¾

1722

1938

9½

6¾

1229

1453

—

—

—

8½

1748

1881

Ranges with 4⅖ Shells from a 12 Pounder, Medium.

Elevation.

8 Ounces.

12 Ounces.

1 lb. 8 oz.

Flight.

First

Graze.

Extreme.

Flight.

First

Graze.

Extreme.

Flight.

First

Graze.

Extreme.

Deg.

Sec.

Yards.

Yards.

Sec.

Yards.

Yards.

Sec.

Yards.

Yards.

1

1½

156

2

2

293

2½

350

707

3

2½

363

From

3½

355

From

758

From

4

3½

462

800

4

679

1100

849

1400

5

4

587

to

3½

641

to

1075

to

6

4

621

1200

5

941

1300

1150

1600

7

4½

898

6

1020

1300

8

5

781

Ranges with French Brass Field Guns,

with Round Shot.

Nature.

Charge.

Elevation.

Range in

Toises.

Lines of

Tangt. Scale.

Deg.

Min.

12 Pr.

4 lbs.

L. M.

—

58

300

2

1

3

350

10

1

39

400

14

1

49

450

16

1

56

480

8 Pr.

2½ lbs.

L. M.

—

58

300

6

1

24

350

12

1

51

400

16

2

8

450

20

2

24

480

4 Pr.

1½ lbs.

L. M.

—

58

250

4

1

20

300

8

1

40

350

12

2

—

400

16

2

20

450

18

2

40

480

The above are in French weights and measures.

GUNPOWDER.—Proportions of the different Ingredients for making Gunpowder, by different Powers in Europe:

Eng.

France.

Swed.

Poland.

Italy.

Russia.

Saltpetre

75

75

75

80

76½

70

Sulphur

10

9½

9

8

12½

11½

Charcoal

15

15½

16

12

12½

18½

Pounds

100

100

100

100

100

100

Proofs of Powder.—The first examination of powder in the king’s mills, is by rubbing it in the hands to find whether it contains any irregular hard lumps. The second is by blasting 2 drams of each sort on a copper plate, and in this comparing it with an approved powder; in this proof it should not emit any sparks, nor leave any beads or foulness on the copper. It is then compared with an approved powder, in projecting an iron ball of 64 lbs. from an 8 inch mortar, with a charge of 2 ounces. The best cylinder powder generally gives about 180 feet range, and pit 150; but the weakest powder, or powder that has been redried, &c. only from 107 to 117 feet.

The merchants’ powder, before it is received into the king’s service, is tried against powder of the same kind made at the king’s mills; and it is received if it gives a range of ¹/₂₀ less than the king’s powder with which it is compared. In this comparison both sorts are tried on the same day, and at the same time, and under exactly the same circumstances.

The proof of fine grained, or musquet powder, is with a charge of 4 drams from a musquet barrel, to perforate with a steel ball a certain number of ½ inch wet elm boards, placed ¾ inch asunder, and the first 39 feet 10 inches from the barrel: the king’s powder generally passes through 15 or 16, and restoved powder from 9 to 12. The last trial of powder is by exposing about 1 pound of each sort, accurately weighed, to the atmosphere for 17 or 18 days; during which time, if the materials are pure, it will not increase anything material in weight, by attracting moisture from the atmosphere.

In this exposure 100 lbs. of good gunpowder should not absorb more than 12 oz. or somewhat less than one per cent.

Powder Marks.—The different sorts of powder are distinguished by the following marks on the heads of the barrels.

Nᵒ. ½

Cylinder

Marked in Red.

L G

Nᵒ. 2

Cylinder

S G

Nᵒ. 3

Cylinder

F G

S A—The dust from Nᵒ. 3, and F G cylinder.

R A—For rifle arms.

⁴/₇ Cylinder

mixed—Marked white L G.

³/₇ Restoved

L G or F G in blue, is powder made of pitcoal.

Nᵒ. ½  L G

Marked in yellow,

is restoved.

Nᵒ. 3  F G

The red L G, F G, or S G, denotes powder entirely made of the cylinder charcoal, and is that which is now always used on service. The white L G being a mixed powder, is not so uniform as the other, and is therefore generally used in filling shells, or for such other purposes as do not require much accuracy. All powder for service is mixed in proportions according to its strength, so as to bring it as much as possible to a mean and uniform force.

French Gunpower.—The French proof ball is of brass, and weighs 60 lbs. French: the diameter of the mortar 7 inches 9 points, or ¾ of a line, and has one line of windage. The chamber holds exactly 3 ounces; and their best powder must give a range of 90 toises, and their restoved powder a range of 80 toises, to be received into the service. But the powder they now make, when new, will give a range of 100 and 120 toises; and Mr. Lombard calculates all his tables from experiments made with powder giving 125 toises with the eprovette.—The above dimensions and weights are all of French standard.

GUN METAL—is composed of 8 or 10 lbs. of tin to 100 lbs of copper.—The largest proportion of tin is used for mortars

H AIRCLOTH—Weight 30 lbs.—length 15 feet—breadth 11 feet.

HAND BARROW.—Weight 13 lbs.—length 5 feet 4 inches.

HANDSPIKES.—Common, weight 11 lbs. length 6 feet.

HARNESS.—For men, one set, 26 lbs. length, 12 feet.—Wheel harness for a pair of horses, such as is used in the service of artillery, about 1 cwt.

HORSES.—An allowance of 3 feet is generally made for the breadth of each horse standing at picket; and about 9 feet for the length of a horse.

A light dragoon horse, mounted and accoutered complete, carries about 2 cwt. 1 qr. and 14 lbs. without forage.

Horses in the service of artillery should not be made to draw above 3 cwt. each, besides the weight of the carriage.

Horses for this service should never be lower than 14¾ hands. The contractor is obliged to furnish them of this height for government.—A horse is generally supposed equal to five men.

Military horses walk about 400 yards in 4½ minutes.

Trot the same distance in 2 minutes 3 seconds, and gallop it in about 1 minute.

With great burthens, less weight must be allowed for each horse to draw, than with medium burthens; as it cannot be supposed that, of a team of 8 horses, the leaders can draw so much as the horses nearer the carriage; and this disadvantage must increase as the team lengthens. A team of

4

horses

may

draw

6

cwt.

each—Total

24

cwt.

including

the

carriages.

6

”

”

”

5

”

”    ”

30

”

8

”

”

”

4½

”

”    ”

36

”

12

”

”

”

4

”

”    ”

48

”

See also the word Load.

It is usual in heavy carriages to reckon all their weight exceeding 12 cwt. as part of the load.

Horses allowed for drawing Field Artillery Carriages.

All the horse artillery carriages are drawn by 4 horses each, except 12 prs. which have 6 each. Park Carriages—12 pr. medium, and 6 pr. heavy, 6 horses each—6 pr. light, and 5½ howitzer, upon the new construction, are allowed each 4 horses, but upon the old only 3 each.

Ammunition

waggon,

common pattern,

3

horses.

”

”

Flanders pattern,

4

”

Forge cart,

2

”

Ammunition

cart,

2

”

HOWITZERS.—Dimensions and Weight of Brass Howitzers.

Nature.

Length

Weight.

Length

of

Bore.

Chamber.

Length

Diameter.

Powder

contained

in

at top

bottom

Inch.

diam.

Ft

Inch

cwt

qrs

lbs

Inches

Inches

Inches

Inches

lbs

oz

10

3

11½

25

3

14

29.9

12.6

5.776

4.12

7

0

8

3

1

12

3

12

24.7

8.61

4.6

3.40

3

8

5½

Heavy

10

0

0

3

0

5½

Light

2

2¾

4

0

2

18.47

6.02

3.2

2.45

1

0

4⅖

1

10

3

0

13

15.21

4.52

2.73

2.24

0

8

French Howitzers, in their own Weights and Measures.

Ft.

In.

lbs.

lbs.

oz.

8 Inches

diameter.

1110

weight.

1

12

charge.

6 Inches

2

3

length.

670

1

12

full.

Table containing the Natures of Howitzers

used by different Powers in Europe.

Nations.

Natures.

Shells.

Wt.

(lbs.)

Prussian

25 Pr.[9]

62

10  —

27

7  —

14

Danish

18  —

36

10  —

20

Saxon

16  —

32

8  —

16

Hanover

30  —

61

16  —

33

English

4⅖ Inch

8

or 4 Pr.

5½ Inch

16

or 8 Pr.

8 Inch

46

or 23 Pr.

French

6 Inch

23

or 12 Pr.

8 Inch

43

or 22 Pr.

Ranges with a light 5½ inch Howitzer. 1798.

Elevation.

4 Ounces.

8 Ounces.

12 Ounces.

1 Pound.

Flight.

Range

to

first

graze.

Extreme

Range.

Flight.

Range

to

first

graze.

Extreme

Range.

Flight.

Range

to

first

graze.

Extreme

Range.

Flight.

Range

to

first

graze.

Extreme

Range.

Deg.

Sec.

Yards.

Sec.

Yards.

Sec.

Yards.

Sec.

Yards.

P. B.

1

96

1½

140

1

159

1

1

66

1½

143

2

334

1½

325

2

1

85

From

1½

184

From

2

351

From

2

490

From

3

1½

100

400

2

258

700

2½

506

1000

3

668

1100

4

1½

110

to

2½

307

to

3

500

to

4

728

to

5

2

115

600

2½

376

1000

3

509

1350

5½

918

1400

6

2

168

yards.

3

408

yards.

3½

581

yards.

5

823

yards.

7

2

194

3½

529

5

872

6

975

8

2½

226

4½

630

6½

975

7

1044

9

2½

282

5

645

7

911

8

1049

10

2½

279

5

642

7

1021

8

1104

11

2½

260

5½

697

7½

1177

8

1173

12

3

315

5½

715

Ranges with a heavy 5½ inch Howitzer. 1793.

Elevation.

2 Pounds.

3 Pounds.

Flight.

Range

to

first

graze.

Extreme

Range.

Flight.

Range

to

first

graze.

Extreme

Range.

Deg.

Sec.

Yards.

Yards.

Sec.

Yards.

Yards.

1

2

453

3

479

2

4

595

5

722

3

4

666

5

921

4

5

847

5

1000

5

5

957

From

7

1325

From

6

7

1173

1400

8

1530

1400

7

9

1449

to

9

1577

to

8

8

1355

1900

9

1721

2000

9

8

1585

9

1801

10

10

1853

9

1791

11

9

1793

12

1013

12

10

1686

L EVELLING—Table shewing the Difference between the True and Apparent Level.

Distance.

Difference

of level.

Distance.

Difference

of level.

Yds.

Inches.

Mls.

Ft.

In.

100

0.026

¼

0

0½

200

0.103

½

0

2

300

0.231

¾

0

4½

400

0.411

1

0

8

500

0.643

2

2

8

600

0.925

3

6

0

700

1.260

4

10

7

800

1.645

5

16

7

900

2.081

6

23

11

1000

2.570

7

32

6

1100

3.110

8

42

6

1200

3.701

9

53

9

1300

4.344

10

66

4

1400

5.038

11

80

3

1500

5.784

12

95

2

1600

6.580

13

112

2

1700

7.425

14

130

1

15

150

16

175

This table will answer several useful purposes.

FIRST.—To find the height of the apparent level above the true, at any distance.—If the given distance be contained in the table, the correction of level is found in the same line with it; but if the exact distance be not found in the table, then multiply the square of the distance in yards, by 2.57, and divide by 1,000,000, or cut off 6 places on the right, for decimals; the rest are inches: or multiply the square of the distance in miles, by 66 feet 4 inches, and divide by 100.

SECOND.—To find the extent of the visible horizon, or how far can be seen from any given height, on a horizontal plane, as at sea, &c.—The height of the observer’s eye above the horizon being known, the extent of his visible horizon is found in the column opposite, under the word Distances.

THIRD.—To find the distance of any object when it first comes in sight, its height being, known.—For the distance of any object will be the extent of the visible horizon of the observer, added to the visible horizon of the point he observes. It is necessary in this case for the observer to know only the height of that part of the object which is kept from his view, by the curvilinear figure of the globe.—Knowing the distance of an object, its height may be found in the same manner.

If the height or distance exceed the limits in the table; then, first, if the distance be given, divide it by 2, 3 or 4, till the quotient comes within the distances in the table; then take out the height answering to the quotient, and multiply it by the square of the divisor for the height required. But when the height is given, divide it by one of these square numbers, 4, 9, 16, 25, &c. till the quotient come within the limits of the table, and multiply the quotient by the square root of the divisor.

LOAD.—Artillery carriages, or waggons, are frequently loaded with 14 cwt. for 3 horses, and 20 cwt. for 4 horses. This, however it may answer on an English road, is a great deal too much for general service. No doubt a carriage of one construction will travel easier than of another, with the same weight; and where the mechanical advantage thus gained is greatest, the heaviest weight may be put, with the same number of horses; but in the carriages usually made for the service of artillery, 4 cwt. per horse, beside the weight of the carriage, is the utmost they ought to be allowed to draw.

The French ammunition waggons, which are drawn by 4 horses, are always charged with 1200 pounds only.

The regulations for home service in 1798 state the load for a bread waggon at 2400 lbs. and for a cart of entrenching tools at 400 lbs. Men used to bear loads, such as porters, will carry from 150 to 250 pounds.

A horse will carry about 300 lbs. and a mule about 250 lbs.—See also the word Horses.

M AGAZINES—The present practice is not to make large powder magazines for batteries, but to disperse the barrels of powder, or cartridges here and there in small magazines, about 6 or 7 fathoms, in the rear of the battery; as it appears better to loose a small quantity from time to time, than to run the risk of the whole being destroyed, by a single shell falling into the magazine. These small magazines or entrenchments, will hold about one or two tons of powder; and are about 8 or 9 feet square. They ought to be well covered from the fire of the place, and always in the rear of one of the merlons. When they cannot be sunk in the ground, they should be secured by sand bags or gabions. They should be made with attention, as should the communication from them to the battery. Two magazines of this kind will be required for a battery of six pieces.

Permanent Powder Magazines.—According to Vauban’s plan, powder magazines are commonly made 10 fathoms long, and 25 feet wide, in the clear. The foundation of the longest sides, is 9 or 10 feet thick, and 6 feet or more deep, according to the nature of the ground. The side walls raised upon these are 8 or nine feet thick; and if there is not to be an upper story, 8 feet will be sufficient height above the foundation. By this means the flooring maybe raised above the ground, free from damp, and there will remain 6 feet from the floor to the spring of the arch. The arch is formed of layers of bricks, arched one over the other, and ought to be 3 feet thick at the top. The exterior surface of the arch terminates with, an angle at top, like a roof; which angle must be of such magnitude as to make a thickness of 8 feet over the key stone of the arch. The foundation at the gable ends is 5 feet thick, and the same depth as the sides; these ends are built up 4 feet thick, from the foundation to the top of the roof. The long sides are supported by counterforts, 6 feet thick and 4 feet long; and placed 12 feet asunder. The ventilators are placed, one in the centre of each space between the counterforts, and are made with a die across them of 1½ feet. These ventilators are also closed with plates of iron. The magazine is lighted by a window in each end, high up, which are opened and shut by means of a ladder. These windows are secured, each by two shutters, made of plank 2 or 3 inches thick; and the outer one covered with sheet iron, and both fastened with strong bolts. The entrance to the is closed by two doors, one of which opens inwards, and the other outwards; the outward one is covered with sheet iron. The entrance of the magazine should, if possible, be placed towards the south. A wall of 1½ feet thick, and 10 feet high, is built round the magazine, at 12 feet distance. A magazine of the above dimensions will contain about 94,800 lbs. of powder, in piles of 3 barrels each; for a greater number piled above each other destroys the barrels, damages the powder, and occasions accidents.

MATCH.—The slow match used by the English is made by contract: one yard of it will burn about 8 hours. The French slow match is usually made by soaking light twisted white rope for three days in a strong lye. It burns about 3 feet in 6 hours.

Slow match was made at Gibraltar, during the last siege, in the following manner: eight ounces of saltpetre were put into a gallon of water, and just made to boil over a slow fire; strong blue paper was then wetted with the liquor, and hung to dry. When dry, each sheet was rolled up tight, and the outward edge pasted down, to prevent its opening; half a sheet, thus prepared, will burn 3 hours.

Quick Match.

Compositions.

Worsted Match.

Worsted

10

oz.

Mealed powder

10

lbs.

Spirits of wine

3

pints.

Water

3

”

Isinglass

½

pint.

Cotton Match.

Cotton

1 lb 12

oz.

Saltpetre

1    8

Mealed powder

10

—

Spirits of wine

2

quarts.

Water

3

pints.

The worsted or cotton must be laid evenly in an earthen or other pan, and the different ingredients poured over it, and about half the powder: being left a short time to soak, it is afterwards wound smoothly on a reel, and laid to dry, remaining half of the powder is then sifted over it; and it is ready for use when dry.

Note. The French have lately made their slow match by soaking the rope in a solution of sugar of lead and rain water: in the proportion of ¾ of an ounce of sugar of lead to one pint of water; and this, they esteem as preferable to the old sort.

MARCHING.—The Quick step, 108 paces per minute, each of 30 inches; making 270 feet per minute.

Wheeling Step, 120 per minute, of 30 inches each; making 300 feet per minute.

Side Step.—12 inches—75 per minute.

Ordinary Step.—75 per minute, 30 inches each.

DUNDAS.

The usual rate of marching for cavalry is 17 miles in 6 hours; but this may be extended to 21, or even 28 miles in that time.

D’ANTONI.

Rates to be paid for Carriages on the March.

One shilling per mile

for every carriage

with 5 horses, or

with 6 oxen, or

with 4 oxen and 2 horses;

nine pence per mile for any cart with 4 horses, and so in proportion for less carriages; or a further sum, not exceeding 4d per mile for every carriage with 5 horses, or with 6 oxen, or with 4 oxen and 2 horses; or 3d per mile for every cart with 4 horses; and so in proportion for less carriages, as the same shall be fixed and ordered by the justices of the peace. The waggons, &c. not to carry more than 30 cwt.

Regular ferries are only to be paid for on the march at half the ordinary rate.

Mutiny Act.

Marching Money.—Innkeepers are obliged to furnish troops on the march with diet and small beer, for the day of their marching in, and two days afterwards; unless one of the two days be a market day. For which the publican by the King’s warrant, 17th of March, 1800, is to receive 16d, and which is paid in the following manner:

Paid

by Government,

Cavalry

9d.

Infantry

11d.

”

by the soldier

”

6d.

”

4d.

Soldiers beer money

”

1d.

”

1d.

Total

16

16

MEASURES.

Long Measure.

12 Inches

make

1 Foot.

3 Feet

”

1 Yard.

5½ Yards

”

1 Pole, or perch.

40 Poles

”

1 Furlong.

8 Furlongs

”

1 Mile.

4 Inches

”

1 Hand.

6 Feet

”

1 Fathom, or toise.

3 miles

”

1 League.

60 Nautical, or

”

1 Degree.

geographical miles, or

69½ statute miles.

Square Measure.

144 Square inches

make

1 Square foot.

9 Square feet

”

1 Square yard.

30¼ Square yards

”

1 Square pole.

40 Square poles

”

1 Square rood.

4 Square roods

”

1 Square acre.

Solid, or Cubic Measure.

1728 Cubic inches

make

1 Cubic foot.

27 Cubic feet

”

1 Cubic yard.

251 Cubic inches

”

1 Gallon, wine measure.

281   ”      ”

”

1 Gallon, beer measure.

168⅗   ”      ”

”

1 Gallon, dry measure.

Dry Measure.

8 Pints

make

1 Gallon.

2 Gallons

”

1 Peck.

4 Pecks

”

1 Bushel.

4 Bushels

”

1 Coom.

2 Cooms

”

1 Quarter.

5 Quarters

”

1 Wey.

2 Weys

”

1 Last.

Avoirdupois Weight.

16 Drams

make

1 Ounce.

16 Ounces

”

1 Pound.

25 Pounds

”

¼ of a hundred.

4 Quarters

”

1 Hundred.

20 Hundred

”

1 Ton.

14 Pounds

”

1 Stone.

French Weights and Measures.

The toise is commonly used in France for military purposes, and is divided into 6 feet: each foot 12 inches; each inch 12 lines; each line 12 points. The pace is usually reckoned at 2½ feet.

Poids de Mare, ou de Paris.

24 Grains

make

1 Den’r.

3 Den’rs

”

1 Gros.

8 Gros

”

1 Ounce.

8 Ounces

”

1 Marc.

2 Marcs

”

1 Pound.

The French have lately formed an entire new system of weights and measures: the following short account of them, and their proportion to the old weights and measures of France, and those of English standard, is extracted from Nicholson’s Nat. Philosophy.

Proportions of

First part of

the measures of

the name which

each species to

indicates the

its principal

proportion to

measure or unity.

the principal

measure or unity.

10,000

Myria

1,000

Kilo

100

Hecto

10

Deca

0

———

0

.1

Deci

0

.01

Centi

0

.001

Milli

- (A) = Proportion of the principal measures between themselves and

- the length of the Meridian.

- (B) = Value of the principal measures in the ancient French measures.

- (C) = Value in English measures.

PRINCIPAL MEASURES, or UNITIES.

Length.

Capacity.

Weight.

Agrarian.

For Firewood.

Metre.

Litre.

Gramme.

Are.

Stere.

(A)

10,000,000th

Weight of a

part of the

A

centimetre

100

One

dist. from

part of

cube of

square

cubic

the Pole to

the cube.

distilled

metres.

metre.

the Equator.

water.

(B)

3 feet

1 pint and

18 grains

2 square

1 demi voie,

11 lines

1-20, or a

& 841,000

perches

or ¼ of a

and ½

litron and

parts.

des eaux

cord des eaux

nearly.

1-4 nearly.

et toret.

et fore.

(C)

6.083 inch,

Inches

which is

22,966

11.968

39.383

more than

grains.

square

the wine

yards.

& less

than the

beer quart.

Reduction of the old French Weights and

Measures to English; and the contrary.

1st.

To

reduce

English Avoirdupois to Paris weight:

The avoirdupois pound of 16 ounces,

Paris grains.

or 7000 troy grains.  = 8538

The

ounce

= 533.6250

2d.

To

reduce

Paris running feet or inches into

1.065977

English, multiply by

”

”

English running feet or inches into

Paris, divide by

3d.

To

reduce

Paris cubic feet or inches into

1.211278

English, multiply by

”

”

English cubic feet or inches into

Paris, divide by

4th.

To

reduce

the Paris pint to the English,

2.0171082

multiply by

”

”

the English pint to the Paris,

divide by

L   AVOISIER CH.

German Measures.—The Rhinland rood is the measure commonly used in Germany and Holland, and in most of the northern states, for all military purposes. It is divided into 12 feet. The Rhinland rood is sometimes divided into tenths, or decimal feet, and the pace is made equal to 2 decimal feet, or ²/₁₀ of a rood.

Proportion between the English Weights and Measures,

and those of the principal Places in Europe.

Places.

Foot in Parts.

Pound in Parts.

London

1000

100

Paris

1068

108

Amsterdam

942

93

Rhinland

1033

96

Antwerp

946

98

Lovaine

958

98

Middleburgh

991

98

Strasburgh

920

93

Bremen

964

96

Cologne

954

97

Frankfort

948

93

Leipsig

—

117

Hamburg

—

95

Venice

1153

151

Prague

1026

106

Copenhagen

965

94

Nuremburgh

1006

94

Bavaria

954

—

Vienna

1053

83

Madrid

1001

99

Toledo

899

100

Bologne

1204

127

Naples

861

—

Florence

—

123

Genoa

—

142

Mantua

1569

143

Turin

1062

—

Dantzig

944

119

Measures—for gunpowder.

Diameters and Heights of

Cylindric Powder Measures,

holding from 1 to 15 Ounces.

Ounces

0

1

2

3

4

5

0

0

1.256

1.583

1.811

1.994

2.148

1

2.706

2.793

2.876

2.953

3.027

3.098

Diameters and Weights of

Cylindric Powder Measures,

holding from 1 to 15 Pounds.

Pounds

0

1

2

3

4

5

0

0

3.165

3.988

4.565

5.024

5.412

1

6.890

7.039

7.245

7.442

7.628

7.805

The above are in inches and decimals.

MECHANICS.—The whole momentum or quantity of force of a moving body, is the result of the quantity of matter, multiplied by the velocity with which it is moved; and when the product arising from the multiplication of the particular quantities of matter in any two bodies, by their respective velocities are equal, their momentum will be so too. Upon this easy principle depends the whole of mechanics; and it holds universally true, that when two bodies are suspended on any machine, so as to act contrary to each other; if the machine be put in motion, and the perpendicular ascent of one body multiplied into its weight, be equal to the perpendicular descent of the other, multiplied into its weight: those bodies, how unequal soever in their weights, will balance each other in all situations: for, as the whole ascent of the one is performed in the same time as the whole descent of the other, their respective velocities must be as the spaces they move through; and the excess of weight in one is compensated by the excess of velocity in the other. Upon this principle it is easy to compute the power of any engine, either simple or compound; for it is only finding how much swifter the power moves than the weight does, (i. e. how much further in the same time,) and just so much is the power increased by the help of the engine.

The simple machines usually called mechanic powers, are six in number, viz. the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Wedge, and the Screw.

There are four kinds of Levers: 1st, Where the prop is placed between the weight and the power. 2d, Where the prop is at one end of the lever, the power at the other, and the weight between them. 3d, Where the prop is at one end, the weight at the other, and the power applied between them. 4th, The bended lever, which differs from the first in form, but not in property.

In the first and 2d kind, the advantage gained by the lever, is as the distance of the power from the prop, to the distance of the weight from the prop. In the 3d kind, that there may be a balance between the power and the weight, the intensity of the power must exceed the intensity of the weight, just as much as the distance of the weight from the prop exceeds the distance of the power from the prop. As this kind of lever is disadvantageous to the moving power, it is seldom used.

Wheel and Axle.—Here the velocity of the power is to the velocity of the weight, as the circumference of the wheel is to the circumference of the axle.

Pulley.—A single pulley, that only turns on its axis, and does not move out of its place, serves only to change the direction of the power, but gives no mechanical advantage. The advantage gained in this machine, is always as twice the number of moveable pullies; without taking any notice of the fixed pullies necessary to compose the system of pullies.

Inclined Plane.—The advantage gained by the inclined plane, is as great as its length exceeds its perpendicular height. The force wherewith a rolling body descends upon an inclined plane, is to the force of its absolute gravity, as the height of the plane is to its length.

Wedge.—This may be considered as two equally inclined planes, joined together at their bases. When the wood does not cleave at any distance before the wedge, there will be an equilibrium between the power impelling the wedge, and the resistance of the wood acting against its two sides; when the power is to the resistance, as half the thickness of the wedge at the back, is to the length of either of its sides; because the resistance then acts perpendicular to the sides of the wedge: but when the resistance on both sides acts parallel to the back, the power that balances the resistance on both sides will be, as the length of the whole back of the wedge is to double its perpendicular height. When the wood cleaves at any distance before the wedge, (as it generally does) the power impelling the wedge will be to the resistance of the wood, as half the length of the back is to the length of either of the sides of the cleft, estimated from the top, or acting part of the wedge.

Screw.—Here the advantage gained is as much as the circumference of a circle described by the handle of the winch, exceeds the interval or distance between the spirals of the screw.

There are few compound engines, but what, on account of the friction of parts against one another, will require a third part more power to work them when loaded, than what is required to constitute a balance between the power and the weight.

FERGUSON’S Nat. Philosophy

MILE.—Comparison of the different miles, in geometric paces, each of which is equal to 5 feet French royal, 5.6719 feet Rhinland, or 6.1012 English feet.

The mile of

Sweden

=

5761

geometric paces.

”   ” ”

Switzerland

4512

”   ” ”

Denmark

4071

Common, of

Germany

4000

”      ”

Holland

3158

League of

France

2400

” ”

Spain

2286

” ”

Scotland

1500

Mile of

Italy

1000

”  ”

England

868

Werste of

Russia

575

MINE.—The excavation formed by the blowing up of a mine is found by experiment to be nearly a paraboloid. It was formerly supposed that the diameter of the entonnoir, or excavation, was always equal to only double the line of least resistance; but experiments have proved, that the diameter of the excavation may be increased to six times the line of least resistance; and that the diameter of the globe of compression may be increased to eight times that line; this is called the maximum of a mine, or the greatest effect that can be produced by a globe of compression. In any mine intended to produce an effect within this extent, the effects will be nearly as the charges.

The globes are to each other as the cubes of their radii. Their radii are the hypothenuses of rightangled triangles, of which the line of least resistance, and the semi-diameter of the excavation, are the other two sides. Therefore, to find the charge to produce any required diameter of the excavation, the following will be the rule, the radius being found as above:

As the cube of the radius of the globe of compression in the following table, (having the same line of least resistance as the required globe,)

Is to the cube of the radius of the required globe;

So is the charge corresponding in the following table,

To the charge required.

Table for the Charges of Mines,

according to Valiere.

Line of

Least

Resistance.

Charge for

the Mine.

Line of

Least

Resistance.

Charge for

the Mine.

Feet.

lbs.

oz.

Feet.

lbs.

oz.

1

0

2

21

868

3

2

0

12

22

998

4

3

2

8

23

1140

10

4

6

—

24

1296

—

5

11

11

25

1558

9

6

20

4

26

1647

12

7

32

2

27

1815

4

8

48

—

28

2058

—

9

68

5

29

2286

7

10

93

12

30

2530

4

11

124

12

31

2792

4

12

162

—

32

3072

—

13

205

15

33

3369

1

14

257

4

34

3680

22

15

316

4

25

4019

8

16

384

—

36

4374

—

17

460

9

37

4748

11

18

546

12

38

5144

4

19

643

—

39

5561

2

20

750

—

40

6000

—

This table is calculated upon a supposition that the excavation of the mine is a paraboloid, having a base double the line of least resistance; and that 10 lbs. 10 oz of powder is sufficient for raising one cubic fathom of earth, by making the line of least resistance of the required globe only equal to the radius of the globe of compression.

The charges thus found by means of this table, being only for one nature of soil; viz. light earth and sand, (that for which the table is calculated) must be augmented according to the following table of Vauban’s, by one, four, five, seven, or nine elevenths of the charge found.

Table of the Quantity of Powder

required to raise a Cubic Fathom,

according to the Soil.

1 Light earth, mixed with sand

11 pounds.

2 Common earth

12

3 Strong sand

15

4 Clay, or fat earth

16

5 Old and good Masonry

18

6 Rock

20

The following rule is however laid down by Belidor, and generally adopted, if it be intended that the mine shall produce its maximum or greatest effect: Multiply the line of least resistance, expressed in feet, by 300, the product will be the charge in pounds.

In making mines of any kind, the following remarks may be of service.

The best form for the chamber would be spherical; but from the difficulty of its construction, it is always made a cube, of one inch larger dimensions than the box to contain the powder.

The chamber must not be made in the prolongation of the branch of the mine, but at one side, and lower than the level of the branch, if the soil be dry; but higher if it be wet.

One cubic foot will contain 75 lbs. of powder; upon which principle the size of the case to contain the powder must be regulated. The auget is generally one inch square interior dimensions, and the end of it must reach the centre of the chamber; where the saucisson must be fastened, to prevent its being easily pulled out.

The branch of the mine to be sprung must be closed in the strongest manner by doors well secured by props, and must be stopped with earth or rubbish to a distance, taken in a straight line, equal to 1½ times the line of least resistance.

In proportioning the length of saucisson, in order that any number of mines may be fired at the same instant, a return of a right angle is generally reckoned equal to 4 inches in a right line.

The first step in making a mine, whether for attack or defence, is to sink a shaft to the depth of the bottom of the gallery, having two of its sides in the direction of the sides of the gallery. These shafts should be where the galleries are to cross each other, or in the centre of the length of gallery to be made. These shafts should never be further apart than 40 or 50 fathoms; for it is found, that the air is not fit for respiration in the larger galleries at a greater distance from the shaft than 25 fathoms; at 20 fathoms in those of medium dimensions; and at 15 in the smallest.

The rectangular frames used in sinking a shaft are commonly placed 4 feet asunder; and in the galleries they are only 3 feet. A gallery intended to be lined with masonry, must be 7 feet high, and 6 feet wide, in order that it may be, when finished, 6 feet high, and 3 feet wide.

Temporary galleries are only made 4½ feet high, and 2½ or 3 feet wide.

The branches, at the ends of which the chambers are to be placed, are only made 2½ or 3 feet high, and 2 feet, or 2 feet 3 inches wide.

The first of these is dug on the knees; the second sitting or lying.

The miners are divided into brigades of 4 each; and the rate of work for each brigade is 3 feet of the temporary gallery in 4 hours. The first brigade is relieved by a second, after having worked 4 hours, or laid one frame; which second brigade is again relieved by the first, at the expiration of the same time.

In the most easy ground to work, a miner may be heard to the distance of 14 or 15 fathoms under ground; and the noise made by fixing the frames of the galleries may often be heard as far as 20 or 25 fathoms. A drum braced, standing on the ground, with a few peas or other round substances on the head, will be very sensibly affected by an approaching miner.

It is of the most essential consequence to place the entrances to the countermines beyond the reach of any surprise from the enemy.

To prevent an enemy gaining possession of the galleries of the countermines, they should be well secured by strong doors, at every 15 fathoms. These should be musquet proof.

A glacis, properly countermined, and every advantage taken of it to retard the besiegers, may, with proper management, prolong a siege at least 2 months; and if the rest of the works are also countermined, and properly defended, they may add another month to the siege. Every system of countermines must depend upon the system of fortification to which they are to be adapted; the general principle for their regulation is, that the galleries should occupy situations, from which branches can be most readily run out under the most probable points of the besieger’s batteries and approaches. The general system of countermines commonly used in a place prepared beforehand, is as follows:—The principal or magistral gallery runs all round the work, under the banquette of the covert way, and across the places of arms, having the entrances at the re-entering places of arms. Nearly parallel to this at 20, 25, or 30 fathoms distance is another gallery, called the envellope. These two galleries are connected by galleries of communication, under the gutters of the re-entering parts of the glacis, and under the ridges of the salient parts. From the envellope are run out about 15 or 16 fathoms, galleries, in directions parallel to the capitals of the works, and at 23 fathoms distance from each other. These are called listeners.

Sometimes, shafts are sunk from the ends of these listeners, and by connecting these shafts, a second envellope formed. Behind the escarps of the different works, galleries are likewise made, about the level of the bottom of the ditch; from whence branches may be run out into or under the foundations of the walls; and if the ditch be dry, galleries of communication may be made from these to the magistral gallery; and from which communications branches may be run out for chambers to annoy the besiegers in their passage of the ditch. The entrances to the escarpe galleries are by means of posterns, which descend from behind the interior slope of the rampart.

If a place be not countermined before hand, a great deal may be done, even after the investment of the place, to prolong the siege by countermines. In this case, the first thing to be done immediately that the place is invested, to sink a shaft in each of the places of arms of the covert way; one in each branch of the covert way, opposite that part of the bastion where the breach will most probably be made; and one in the flanked angle of each bastion. Those on the covert way will be on the banquette, and sunk to about 18 inches below the bottom of the ditch. Those in the bastions to about 12 feet below the bottom of the ditch. Thus prepared, the moment the side on which the attack is to be made can be ascertained, galleries must be carried on from these shafts on the side attacked along the capitals, in the form of tressles; or double T; and advanced as far into the country as the time will admit. Communication galleries may likewise be driven between these different works on the covert way, and from them to the work in the bastion; which will prevent the enemy gaining possession of their entrances. All these works may be carried on after the investment of the place; and be in sufficient forwardness by the time the enemy gains the third parallel.

The following rules are given by Vauban for fougasses, or small mines, having the diameter of the excavation equal to double the line of least resistance: The side of the chamber must be exactly a sixth part of the depth of the shaft. The side of the box to hold the powder exactly a ninth part of the depth of the shaft.

These remarks respecting mines are principally extracted from the General Essay on Fortification before mentioned, written in French, and published at Berlin, 1799.

MORTARS.—Weight and Dimensions of English Mortars.

Nature.

Weight.

Length.

Powder

contained in

Chamber.[10]

Range

at 45°.

ct.

qr.

lbs.

Ft.

In.

lbs.

oz.

Yds.

13

Brass

Sea S.

82

—

8

5

3

32

—

4100

Iron

82

1

—

20

—

Brass

Land

25

—

10

3

7½

3

12

2100

Iron

36

2

12

9

8

10

Brass

Sea S.

33

—

—

4

8

12

8

3800

Iron

41

—

—

10

—

Brass

Land

10

1

25

2

9

4

10

1900

Iron

16

—

6

4

8

8

Brass

Land.

4

4

8

2

1¾

2

—

1600

Iron

8

—

11

2

4

5½

Brass

Land.

1

—

20

1

4¼

—

9

1200

4⅖

Brass

Land.

—

3

11

1

1½

—

4½

1000

French Mortars, in their own Weights and Measures.

lbs.

12

Inches

2060

3

7

2400

10

for long Ranges

2000

7

4

2800

10

”   short ”

1560

4

—

2200

8

”   ”    ”

595

1

4¾

1160

Stone Mortars.[11]

1100

2

8

12

inch

Gomers

2750

12

—

2700

10

”

2000

6

8

2800

8

”

600

2

—

1400

Ranges with a 10 Inch Sea Mortar, at

21 Degrees, on a Horizontal Plane.

Weight of

Mortar.

Weight of

Shell.

Charge.

Elevation.

Flight.

Range.

ct.

qrs.

lbs.

lbs.

oz.

lbs.

oz.

Deg.

Sec.

Yards.

34

2

14

86

—

5

8

21

14¾

2335

87

—

16

2510

Ranges with Sea Service, Iron Mortars, at 45 Degrees,

upon a Horizontal Plane. 1798

13 Inch.

10 Inch.

Charge.

Flight.

Range.

Charge.

Flight.

Range.

lbs.

oz.

Sec.

Yards.

lbs.

oz.

Sec.

Yards.

2

—

13

690

1

—

13

680

4

—

18

1400

2

—

18

1340

6

—

21

1900

3

—

21

1900

8

—

24½

2575

4

—

24

2500

10

—

26½

2975

5

—

26

2800

12

—

29

3500

6

—

27

3200

14

—

29½

3860

7

—

29

3500

16

—

30

3900

8

—

30

3800

18

—

30½

4000

9

—

30¼

3900

20

—

31

4200

9

8

30½

4000

Ranges with French Mortars, at 45 Degrees,

in French Weights and Measures.

12 Inch.

10 Inch.

long Ranges.

10 Inch.

short Ranges.

8 Inch.

Charge.

Range.

Charge.

Range.

Charge.

Range.

Charge.

Range.

lbs.

oz.

Yards.

lbs.

oz.

Yards.

lbs.

oz.

Yards.

lbs.

oz.

Yards.

1

—

388

1

—

450

1

—

658

—

5

316

1

8

632

2

—

1080

1

8

964

—

10

794

2

—

862

3

—

1536

2

—

1280

—

15

1112

2

8

954

4

—

2070

2

8

1428

1

4

1280

3

—

1292

5

—

2206

3

—

1432

3

8

1390

6

2½

2304

3

10¼

1920

Medium Ranges with Land Service Iron Mortars,

at 45 Degrees. 1798.

13 Inch.

10 Inch.

Charge.

Flight.

Range.

Charge.

Flight.

Range.

lbs.

oz.

Sec.

Yards.

lbs.

oz.

Sec.

Yards.

—

14

6½

245

—

8

6½

235

1

—

7½

318

—

10

8

358

1

4

8½

412

—

12

9

464

1

8

9½

523

—

14

10

534

1

12

10½

613

1

—

10½

638

2

—

11

697

1

2

11½

749

2

4

12½

840

1

4

13

873

2

8

13

906

1

6

13½

956

2

12

14

1054

1

8

14

1028

3

—

15

1132

1

10

15

1123

3

4

16

1244

1

12

15

1226

3

8

16½

1317

1

14

16

1325

3

12

17

1424

2

—

16½

1357

4

—

17

1490

2

2

17

1480

4

4

17½

1580

2

4

17½

1532

4

8

18½

1656

2

6

17½

1571

4

12

19

1744

2

8

18½

1700

5

—

19½

1824

2

10

19

1780

5

4

19½

1900

2

12

19½

1825

5

8

20

1950

2

14

20

1880

5

12

20½

2062

3

—

20

1916

6

—

21

2095

4

—

25

2485

7

—

24

2510

4

8

26

2536

8

—

25

2706

8 Inch.

5½ Inch, Brass.

Charge.

Flight.

Range.

Charge.

Flight.

Range.

lbs.

oz.

Sec.

Yards.

lbs.

oz.

Sec.

Yards.

—

5

6

225

1

8

5½

155

—

6

7½

328

1

12

6

198

—

7

8½

428

2

—

6½

255

—

8

9½

474

2

4

7½

316

—

9

10

560

2

8

8

380

—

10

11

664

2

12

8½

426

—

11

12

762

3

—

9½

470

—

12

12½

801

3

4

10

540

—

13

13½

859

3

8

10½

590

—

14

14

960

3

12

11

630

—

15

14½

1011

4

—

11½

725

1

0

14½

1115

4

4

12

746

1

1

15

1156

4

8

12½

800

1

2

16

1262

4

12

13½

910

1

3

16½

1320

5

—

13½

935

1

4

17

1380

5

4

14

1016

1

5

17½

1446

5

8

—

—

1

6

18

1530

5

12

—

—

1

7

18½

1600

6

—

15

1175

1

8

19

1660

1

9

19½

1720

Medium Ranges with Brass Mortars,

at 45 Degrees. 1780.

13 Inch.[12]

10 Inch.

8 Inch.

Charge.

Range.

Charge.

Range.

Charge.

Range.

lbs.

oz.

Yards.

lbs.

oz.

Yards.

oz.

dr.

Yards.

2

12

862

1

10

823

10

8

580

2

14

939

1

11

852

11

—

635

3

—

998

1

12

783

11

8

711

3

2

1003

1

13

758

12

—

708

3

4

1090

1

14

823

12

8

701

3

6

1139

1

15

888

13

—

777

3

8

1165

2

—

892

13

8

825

3

10

1209

2

1

940

14

—

870

3

12

1270

2

2

941

14

8

853

3

14

1322

2

3

1041

15

—

866

4

—

1309

2

4

1128

15

8

899

4

2

1331

2

5

1103

16

—

921

4

4

1391

2

6

1221

16

8

987

4

6

1363

2

7

1258

17

—

987

4

8

1324

2

8

1215

17

8

1062

Ranges with a 5½ inch Brass Mortar,

at 15 Degrees.

Charge.

Flight.

First Graze.

Rolled to

oz.

dr.

Sec.

Yards.

Yards.

2

8

3

209

303

3

—

3½

256

330

3

8

4

375

443

4

—

4½

457

501

4

8

5

530

600

5

—

5½

561

627

5

8

6½

667

715

6

—

7

709

780

Medium Ranges with Land Service Iron Mortars,

at 10 Degrees Elevation.—Powder in Cartridges.

10 Inch.

8 Inch.

Flight.

Charge.

First

graze.

Extreme

Range.

Flight.

Charge.

First

graze.

Extreme

Range.

Sec.

lbs.

oz.

Yards.

Yards.

Sec.

lbs.

oz.

Yards.

Yards.

3

—

12

198

415

3

—

8

202

403

3

1

—

278

458

3

—

10

266

461

4

1

4

366

564

3¼

—

12

351

614

4½

1

8

451

685

4

—

14

413

630

4

1

12

432

686

4¾

1

—

468

754

4¾

2

—

559

938

5

1

2

562

811

5

2

4

602

798

6

1

4

664

950

4¾

2

8

597

976

6½

1

6

700

1028

5

2

12

664

1121

6½

1

8

768

1064

5¼

3

—

764

1169

Medium Ranges with the above Mortars,

at 15 Degrees.

10 Inch.

8 Inch.

Charge.

Flight.

Range.

Charge.

Flight.

Range.

lbs.

oz.

Sec.

Yards.

lbs.

oz.

Sec.

Yards.

1

4

5

464

—

11

4½

427

1

6

5½

543

—

12

4½

485

1

8

6

590

—

13

5

513

1

12

6¾

685

—

14

5½

559

1

14

7

765

1

—

6½

690

2

—

7

805

1

2

7

822

2

4

7½

884

1

4

7

827

2

8

7¾

960

1

6

7¾

1004

2

12

8

1070

1

8

8½

1012

3

—

8½

1154

1

10

8½

1196

1

11

9

1337

N AVY—

Number and Nature of Ordnance for each

of the Ships in his Majesty’s Navy.

Rates.

No. of

Guns

Nᵒ. of Guns of each Nature.

Carronades.

42

32

24

18

12

9

6

32

24

18

12

!st.

100

28

—

28

—

30

—

18

2

6

—

—

2d.

98

—

28

—

30

40

—

—

2

—

6

—

3d.

80

—

26

—

26

—

24

4

74

—

28

—

28

—

18

—

2

6

—

—

70

—

28

—

28

—

14

—

64

—

—

26

26

—

12

—

—

2

6

—

4th.

60

—

—

24

—

26

—

10

—

—

—

—

50

—

—

22

—

22

—

6

—

6

—

6

5th.

44

—

—

—

20

22

—

6

—

—

8

—

36

—

—

—

26

2

8

—

8

—

—

—

32

—

—

—

—

26

—

6

—

6

—

—

6th.

28

—

—

—

—

—

24

4

—

6

—

—

24

—

—

—

—

—

22

2

—

2

6

—

20

—

—

—

—

—

20

—

—

—

8

Sloops.

18

—

—

—

—

—

—

18

—

—

—

8

Dimensions of Ships, Number of Men,

and Draught of Water.

Number

of

Guns

Length

on the

Gundeck.

Extreme

Breadth.

Complement of

Depth of

water

required

for each.

Sailors.

Marines.

Ft.

In.

Ft.

In.

Nᵒ.

Officers.

Feet.

110

190

—

53

—

875

24

100

186

—

52

—

98

180

—

50

—

750

1 Captain.

23

90

177

6

49

—

3 Subalt’s.

80

182

—

49

6

650

18

74

182

—

48

7

74

169

—

46

11

64

160

—

44

6

1 Cap. 2 Sub.

50

146

—

40

6

420

2 Lieuten’ts.

44

140

9

38

8

300

1 Subalt.

16

38

144

—

39

—

36

142

—

38

—

32

126

—

35

4

28

120

—

33

6

200

15

24

114

7

32

3

20

108

—

30

—

18

110

—

29

6

125

Serjeant.

13

16

106

—

28

—

N. B. The usual Complement of Marines is one

for every Gun in the Ship.

O RDNANCE—The value of all brass ordnance is at £84: 17s. per ton, for the metal; that is, the weight of the gun, and 12lbs. per hundred weight for waste: to which is added for casting, on the total weight of metal used, £64 per ton for light pieces; £54 for medium; and £44 for heavy.

Iron ordnance costs £20 per ton. See also the words Guns, Mortars, Howitzers, &c.

For the proof of all kinds of ordnance, see the word Proof.

P ACE—The common pace is of no determined length; though made use of as a measure by most military writers.

In Germany, and amongst most of the northern powers, the pace is considered equal to ²/₁₀ of a Rhinland rood.

In France the pace is commonly reckoned at 2½ feet.

In England it is usually reckoned at 2½ feet.

The geometrical pace is equal to 5 French royal feet; 60,000 of which make a degree of the equator. This makes the geometrical pace equal 6.102 English feet, and 5.6719 Rhinland feet.

For the military pace, see Marching.

PARALLELS—or places of arms at a siege. See the words Trenches and Sap.

PAY.—Table of the Full Pay of the Officers, Noncommissioned Officers, and Privates in the Army.

Rank.

Life

Guards.

Cavalry.

Foot

Guards.

Infantry of

the line.

Artillery.

Horse.

Foot.

£.

s.

d.

£.

s.

d.

£.

s.

d.

£.

s.

d.

£.

s.

d.

£.

s.

d.

Colonel

1

16

—

1

12

10

1

19

—

1

2

6

—

2

3

6

Colonel en Second

—

—

—

—

1

9

8

1

3

9

1st. Lt. Colonel

1

11

—

1

3

—

1

8

6

0

5

11

1

5

8

—

19

9

2d.  Lt. Colonel

—

—

—

0

15

11

—

—

16

10

1st. Major

1

6

—

—

19

3

1

4

—

0

14

1

1

—

9

—

14

10

2d.  Major

—

—

—

—

—

Captain

—

16

—

—

14

7

—

16

6

0

9

5

—

15

4

—

9

11

Captain Lieut.

0

11

—

—

9

—

—

7

10

0

5

8

0

10

—

—

7

—

1st. Lieut.

0

9

—

—

6

—

2d.  Lieutenant

—

—

—

—

—

8

—

—

5

—

Cornets

—

8

6

—

8

—

—

—

—

—

Ensigns

—

—

—

5

10

—

4

8

—

—

Pay Master

—

—

15

—

—

—

15

—

—

—

Quarter Master

—

6

—

—

5

6

—

5

8

—

5

8

—

6

—

—

6

—

Adjutant

—

11

—

—

5

—

—

—

5

—

—

5

—

—

5

—

Surgeon

—

12

—

—

12

—

—

12

—

—

9

5

—

11

10

—

9

11

Assistant Surgeon

—

—

5

—

—

7

6

—

5

—

—

6

—

—

5

—

Veterinary ”

—

—

8

—

—

—

—

—

Serjeant Major

—

—

—

—

—

3

4

—

3

2

Quarter Master ”

—

—

—

—

—

2

10

—

Serjeant

—

—

2

2

—

1

10¾

—

1

6¾

—

2

4

—

2

2

Corporal

—

2

6¼

—

1

7¾

—

1

4¾

—

1

2¼

—

2

2¼

—

2

2¼

Bombardier

—

—

—

—

—

2

2¼

—

1

10¼

1st. Gunner

—

—

—

—

—

—

1

7

2d.  Gunner

—

—

—

—

—

1

5¼

—

1

3¼

Private

—

1

11¼

—

1

3

—

1

1

—

1

—

—

—

Farrier and Smith

—

—

—

—

—

3

4¾

—

Collar Maker

—

—

—

—

—

2

4¾

—

Wheeler

Trumpeter

—

2

6

—

1

7

—

1

2¼

—

1

1¼

—

2

1¾

—

1

3¼

Drummer

PARK OF ARTILLERY—should always be placed, if possible, within a short distance of water-carriage, and have the most ready communication with every part of the line of the army. Its form must depend on its situation. Ten feet are usually allowed in front for one carriage and its interval, and near 50 feet from the hind wheels of the front row to the fore wheels of the second; this interval should allow sufficient room for putting the horses to the carriages, and for a free passage along the line. In parks not on immediate service, it is customary to arrange the guns with their muzzles to the front; but where the guns are likely to be wanted at a short notice, appearances must not be studied, and the gun carriages must be parked with their shafts to the front, ready to receive horses to them. A quarter-guard is placed in front of the park, and the noncommissioned officers and gunners’ tents on the flanks, at about 20 paces distance and 40 paces to the rear the subaltern officers; at 10 more to the rear the captains, and 10 more the commanding officer. The mess tent is 15 in the rear of the officers. At a convenient distance in the rear of the whole, are the horses, picketed in one or more lines, with the drivers on their flanks. The horses are sometimes picketed in lines perpendicular to the front, and on the flanks of the carriages, between the men and the carriages. See the word Camp, and Artillery in the Field.

PENDULUM—Pendulums for military purposes are best made with a musquet ball, and a piece of silk, or other small line. Their length must be measured from the centre of the ball to the end of the loop on which they are to swing. In a cylinder, or other uniform prism or rod, the centre of oscillation, (from whence they must be measured,) is at the distance of ⅓ from the bottom, or ⅔ below the centre of motion.

Pendulum’s length in latitude of London, to swing

2

Seconds

39⅛

Inches.

½

Seconds

9.8

¼

Seconds

2.45

Length of Pendulums to vibrate 2 Seconds

at every Fifth Degree of Latitude.

Degrees of

Latitude.

Length of

Pendulum.

Inches.

0

39.027

5

39.029

10

39.032

15

39.036

20

39.044

25

39.057

30

39.070

35

39.084

40

39.097

45

39.111

50

39.126

55

39.142

60

39.158

65

39.168

70

39.177

75

39.185

80

39.191

85

39.195

90

39.197

Rule.—To find the Length of a Pendulum to make any Number of Vibrations, and vice versa.

Call the pendulum, making 60 vibrations the standard length; then say, as the square of the given number of vibrations is to the square of 60; so is the length of the standard to the length sought. If the length of the pendulum be given, and the number of vibrations it makes in a minute be required; say, as the given length is to the standard length, so is the square of 60, its vibrations in a minute, to the square of the number required. The square root of which will be the number of vibrations made in a minute.

PETARDS—are of four different sizes:—First, contain 12 lbs. 13 oz.—Second, 10 lbs. 11 oz.—Third, 1 lb. 10.—Fourth, one lb.

Blind fuze composition

mealed powder

7 lbs.

for Petards.

wood ashes

3 oz.

Stores for One Petard.

Hooks to hang the petard

2

Gimblets

2

Brass fuze

1

Wrench to screw the fuze

1

Blue paper portfires

6

Slow match

yards

4

Props or forks

2

Copper funnels

1

Tallow

ounces

8

Cartridges

1

PLATFORMS.—The common platforms for gun batteries require the following materials for each:—5 sleepers or joists, 6 inches square, 14 feet long.—1 hunter, 8 or 10 inches square, 8 feet long, 14 planks, 1 foot wide, 11 feet long, 2½ inches thick.—20 pickets.

The usual slope of platforms for guns is one inch to every yard.

The platforms for mortar batteries are made with 3 sleepers 8 inches square, and covered with about 11 timbers of the same thickness. They are laid perfectly horizontal, about 15 feet asunder, and 12 feet from the epaulment. This is the distance commonly practised for firing only at 45 degrees elevation; but if the platforms be placed at the undermentioned distances from the epaulment, the mortars may be fired at the angles corresponding.

At

13

feet

distance

for

firing

at

30

degrees.

21

feet

”

”

”

at

20

30

feet

”

”

”

at

15

40

feet

”

”

”

at

10

over an epaulment of 8 feet high.

See also the word Battery.

POINT BLANK.—For the point blank ranges of different pieces of ordnance, see the different natures.

The French point blank or but en blanc, is what the English artillery call the line of metal elevation; in most guns between one and two degrees.

PONTOONS.—

Length at

top

21

ft.

6

in.

bottom,

17

2

Width,

4

feet

9

inches.

Depth,

2

feet

3

inches.

Equipage of One Pontoon.

Ft.

In.

Ft.

In.

In.

4 Baulks

22

8

long

1

0

wide

4

thick.

1 Gang-board.

22

0

”

1

0

”

2½

”

6 Chesses,

11

6

”

2

4

”

1½

”

2 Oars.

1 Cable

1 Anchor.

1 Sheer-line.

1 Graplin.

1 Boat hook.

1 Setter.

1 Maul.

4 Iron bolts, with keys.

4 Pickets.

2 Mounting bars.

1 Small pump.

4 Binding sticks.

1 Windlass.

4 Spring lines.

1 Pontoon carriage, complete.

4 Faukes.

Dimensions of Colonel Congreve’s Wooden Pontoons.

feet.

inches.

Length

at top

26

”

at bottom

23

Depth

2

8

Width

2

3

The common pontoons will support a weight of 4 or 5000 pounds. They are generally placed, in forming a bridge, about their own width asunder. See the word Bridge.

PORTFIRES.

Composition. Saltpetre, 60 parts; sulphur, 40 parts; mealed powder, 20 parts. Length of each, 16½ inches.

One will burn from 12 to 15 minutes.

Weight of one dozen, 3 lbs. 12 oz.

Portfires were made at Gibraltar in the following manner; two ounces of nitre was dissolved in a gallon of water, and sheets of soft brown paper dipped in the solution: these when dry were rolled up to about the size of common portfires.

PROVISIONS.—See the word Ration.

PROOF—of ordnance.

All natures of ordnance undergo several kinds of proof before they are received into his Majesty’s service; viz. 1st, They are guaged as to their several dimensions, internal and external, as to the justness of the position of the bore, the chamber, the vent, the trunnions, &c.

2d, They are fired with a regulated charge of powder and shot, and afterwards searched to discover irregularities or holes produced by the firing.

3d, By means, of engines an endeavour is made to force water through them; and,

4th, They are examined internally, by means of light reflected from a mirror.

Iron Guns.—The guns are first examined as to their proper dimensions, in which, in no case more than ³/₁₀ of an inch variation is allowed; and in the diameter of the bore only ¹/₃₀ from 42 to 18 pounders, and ¹/₄₀ from 12 to 4 pounders; but in the position of the bore ½ an inch out of the axis of a piece from a 42 to an 18 Pr. and ⅓ of an inch from a 12 to a 4 Pr. is allowed. They are then fired twice with the charge in the following table, with one shot and two high junk wads; and examined with a searcher after each round. In this examination they must not have any hole or cavity in the bore of ²/₁₀ of an inch in depth, behind the first reinforce ring, or ¼ of an inch in depth before this ring.

Nature.

Proof Charge.

Prs.

lbs.

oz.

42

25

—

32

21

8

24

18

—

18

15

—

12

12

—

9

9

—

6

6

—

4

4

—

3

3

—

2

2

—

1½

1

8

1

1

—

Iron guns are scaled with ¹/₁₂ the weight of the shot.

Brass Guns.—From 1 pounders to 12 pounders the diameter of the bore must not vary more than ¹/₁₀ of an inch, and in no dimensions more than ²/₁₀. The following are the established charges for their proof. The heavy and medium guns with a charge equal to the weight of the shot, except the medium 12 pounder, which is proved with only 9 lbs. The light guns with half the weight of the shot. The brass ordnance have not however been proved of late with such heavy charges, but with the following:

- 3 Prs. light, 3 times, with 1 lb. each round.

- 6 Prs. light, 3 times, with 2 lbs. each.

- 12 Prs. light, 2 times, with 4 lbs. each.

- 12 Prs. Med.  2 times, with 5 lbs. each.

Any hole .15 of an inch deep upwards or sideways in the bore, or .1 in the bottom, between the breach and first reinforce; or .2 of an inch upwards or side ways, or .15 in the bottom of the bore, before the first reinforce ring, will be sufficient to condemn them.

Brass Mortars and Howitzers.—The exterior dimensions are in no respect to deviate more than ¹/₁₀ of an inch in an 8 inch howitzer, and ¹/₂₀ in the royals and Coehorn mortars and howitzers. Their bores and chambers not to deviate from their true diameters or positions more than ¹/₄₀ of an inch.

The brass mortars and howitzers are fired twice with their chambers full of powder, and an iron shell. The mortars on their own beds, at about 75° elevation; and the howitzers on their carriages, at about 12°. Iron mortars are proved on their iron beds; with a charge equal to the full chamber, and an iron shot equal in diameter to the shell.

Royals, or Coehorn mortars, having a hole .1 of an inch in depth in the chamber, or .15 in the chase, are rejected: royal howitzers the same. 8 inch howitzers having a hole .15 of an inch in depth in the chamber, or .2 in the chase, will be rejected.

Carronades.—The diameter and position of their bore and chamber must not deviate ¹/₂₀ of an inch. They are proved with two rounds, with their chambers full of powder, and 1 shot and 1 wad. A hole of ²/₁₀ of an inch in depth in the bore, or ¹/₁₀ in the chamber condemns the piece.

Proof Charges.

68 Prs.

42

32

24

18

12

13 lbs.

9

8

6

4

3

All ordnance, after having undergone this proof, and the subsequent searching, are subject to the water proof: this is done by means of a forcing pump, having a pipe or hose fixed to the mouth of the piece: after two or three efforts to force the water through any honeycombs or flaws which may be in the bore, they are left to dry; and generally the next day examined by the reflected light from a mirror. If the bore contains any small holes or flaws which have not been discovered by the former proofs, they are very readily found by this; the water will continue to weep, or run from the holes, when the solid parts of the bore are perfectly dry. Ordnance suspected of being bad are often subject to a more severe proof: that of firing 30 rounds quick, with the service charge and 2 shot; and in doubtful cases, where the purity of the metal is suspected, recourse has been had to chemical trials and analysis. A quantity of clean filings taken from a part of an iron gun free from rust, are dissolved in the dilute sulphuric acid, and the quantity of gas disengaged during the solution accurately ascertained. The plumbago which remains after solution is also separated by filtration, and carefully weighed. Now it is well known that the purer the iron, the greater the quantify of inflammable gas obtained, and the less the proportion of plumbago which remains after the solution; from these two parts therefore a tolerable judgment may be formed of the quality of the metal. When the plumbago exceeds 4½ per cent. the iron will always be found deficient in strength; and there has been no instance of a gun bursting where the plumbago did not exceed 3 per cent; that is, where 100 grains of the metal did not leave more than 3 grains of plumbago. The colour of the plumbago is also to be attended to; when it is brown or reddish, it is an indication of hard metal, and when in quantities and mixed with coals, there can be no doubt but that the iron is too soft for cannon.

For the proof of Gunpowder, see that word.

Proof of Iron Shells.—After the shells are guaged and examined as to their dimensions and weight, they must be well scraped out, and the iron pin at the bottom of the inside must be driven down or broken off. They are then to be hammered all over, to knock off the scales, and discover flaws, and no hole, in the large shells is allowed, of more than ¾ of an inch deep. An empty fuze is then driven into the fuze hole, and the shell is suspended in a tub of water, in such manner that the shell be covered by the water, but that it does not run into the fuze: in this situation the nose of a pair of bellows is put in at the fuze hole, and several strong puffs given with the bellows; and if no bubbles rise in the water, the shell is concluded to be serviceable.

Ordnance condemned as unserviceable for any of the foregoing reasons, are marked as follows:

X D, or X S, or X W.

The first signifies that they are found to be faulty in their dimensions, by Desagulier’s instrument; the second, by the searcher; and the third, by the water proof.

R ATION—For an officer or soldier.

Complete Ration of the Small Species.

Flour, or bread

1½ lbs.

Beef

1

Or Pork

½

Peas

¼ pint.

Butter, or cheese

1 oz.

Rice

1 oz.

When the small species are not issued, 1½ lbs. of flour or bread, with 1½ lbs. of beef, or 10 oz. of pork, forms a complete ration: or 3 lbs. of beef; or 2 lbs. of cheese; or half a pound of rice, forms a complete ration.

At sea the ration is different. The following table contains the allowance for six soldiers, or four seamen on board of ship, for each day in the week. Women are provisioned at ½, and children at ¼ of a soldier’s allowance, but receive no rum.

- (A) = Beer, Gallons, or half Pints of Spirits,

- or Pints of  Wine.

- (B) = Pint of Oatmeal.

- (C) = lbs. of Butter.

- (D) = lbs. of Butter.

Days of

the Week.

Bread.

(A)

Beef,

Pieces

of 8 lbs.

Pork,

Pieces

of 4 lbs.

Pint of

Peas.

(B)

(C)

(D)

Vinegar.

lb.

Sunday,

4

4

1

2

Monday,

4

4

—

4

½

1

Tuesday,

4

4

1 or 6 lbs. of

flour, or  ½ lb

of suet & 1 lb

of raisins

—

Wednesday,

4

4

—

2

4

½

1

1 quart

Thursday,

4

4

1

2

a week.

Friday,

4

4

—

2

4

½

1

Saturday,

4

4

1

—

or as above

The above are served out by full weights and measures.

When flour, suet and raisins are put on board, they are to be served out in equal proportions with beef, viz. half in beef; the other half in flour, suet, and raisins, on each beef day.

4 lbs. of flour, or 3 lbs. of flour with ½ lb. of raisins, (or ¼ lb. of currants) and ¼ lb. of suet, are equal to 4 lbs. of beef, or 2 lbs. of pork with peas, but are not to be issued in lieu of the latter, except unavoidable, and then the quantities must be certified.

½ lb. of rice is equal to a pint of oatmeal; ½ lb. of sugar is equal to ½ lb. of butter; and 1 lb. of rice is equal to 1 lb. of cheese; 1 pint of oil is equal to 1 lb. of butter, or 2 lbs. of cheese, that is, a pint of oil for the proportion of butter and cheese.

A pint of wine, or ½ pint of brandy, rum, or arrack, is equal to a gallon of beer; 1 lb. of fresh beef is equal to 1 lb. of salt beef; and 1½ lbs. of fresh beef is equal to 1 lb. of pork.

No wine or spirits are to be issued to the troops while in port, nor at sea, till after all the beer is expended.

The masters of transports are to produce a certificate from the commanding officer of the troops on board, of the quantity expended. If any doubt be entertained of the provisions being full weight, a cask must be weighed in the presence of the commanding officer, the master and the mate, and the master may upon the certificate of the commanding officer, and the oath of the mate, issue as much beef and pork as will make up the deficiency.

The weight of each must be as follows: 14 pieces of beef, cut for 8 pound pieces taken out of the cask as they rise, and the salt shaken off, are to weigh 112 lbs. avoirdupois. 28 pieces of pork cut for 4 lb. pieces, are also to weigh, under like circumstances, 112 lbs.

The deductions to betaken for provisions from the pay of officers, noncommissioned officers, or men, are the same for all ranks, and in all corps, under the like circumstances of service, when serving out of Great Britain, on stations where provisions are supplied by the public: also, when embarked in transports or other vessels, (except when serving as marines) also when prisoners of war, and maintained at the expense of Great Britain; also when in general hospitals, whether at home or abroad, a deduction of Six-pence per day.

A deduction of three-pence half-penny from the pay of every noncommissioned officer and private in Jamaica, in New South Wales, or Gibraltar. Noncommissioned officers and soldiers serving as marines shall not be liable to any deduction from their full pay on account of provisions.

Ration for a horse on home service in 1796: 14 lbs. of hay, 10 lbs. of oats, 4 lbs. of straw; for which a stoppage is made of six-pence.

Army Regulations, 1799.

RANK.—Between Land and Sea Officers.

Navy.

Army.

1.

Admiral, or commander of

Field Marshal.

his Majesty’s fleet

2.

Admirals with their flags at the

Generals.

main-top-mast head

3.

Vice Admirals

Lieutenant Generals.

4.

Rear Admirals

Major Generals.

5.

Commodores, with broad pendants

Brigadiers.

6.

Captains commanding post ships,

Colonels.

after 3 years

7.

All Captains commanding post ships

Lieutenant Colonels.

8.

Captains not taking post

Majors.

9.

Lieutenants

Captains.

The rank and precedence of sea officers in the classes abovementioned, are to take place according to the seniority of their respective commissions in the sea service. Post captains commanding ships or vessels that do not give post, rank only as majors during the time they command those vessels.

Nothing in this shall give any pretence to land officers to command any of his Majesty’s squadrons; nor to any sea officer to command on shore; nor shall either have right to demand the military honours due to their respective ranks, unless upon actual service.

RECOIL—Of Field Guns on Travelling Carriages, upon Elm Planks.

Nature.

Charge

1 Shot,

at 1° 30′

Elevation

2 Shot,

at 1° 30′

Elevation

Case Shot,

at 3° 45′

Elevation

lbs.

oz.

Feet.

Feet.

Feet.

12 Pr. Medi.

4

—

12

25

8½

6 Pr. Heavy

2

—

7

11

7½

6 Pr. Light

1

8

12

21

10

3 Pr. Heavy

1

—

7

5

3½

Recoil of Sea Service, Iron Guns, on Ship Carriages, upon a Horizontal Platform.

Charges of Powder

and Shot.

Elevation

32 Pr.

24 Pr.

18 Pr.

Deg.

Ft.

In.

Ft.

In.

Ft.

In.

⅓ of Powder and 1 Shot

2

11

—

11

—

10

6

⅓ of Powder and 2 Shot

4

19

6

18

6

18

—

¼ of Powder and 2 Shot

7

11

6

12

—

12

—

Recoil of Land Service, Iron Mortars, on Iron Beds.

Ft.

In.

13 Inch,

with a

charge of

6 lbs.

4

2½

10 Inch,

”

”

3 lbs.

2

10

8 Inch,

”

”

1lb.   9 oz.

3

10

RECONNOITERING.—The following necessary observations to be made in examining a country in a military point of view, are principally translated from the Aide Memoire, but improved by some judicious remarks from Mr. Landman’s introduction to reconnoitering.

Before an officer sets out to reconnoiter a country, he should trace out from the best map he can procure, its principal features, which will serve him as a guide in his progress through the principal parts which are to be the subject of his observations, and enable him to connect the whole into one grand plan.

His observations should be expressed by written remarks, and by sketches. For this purpose he must be provided with a sketch book, on the right hand page of which, he may express the appearance of the country by sketches, and on the left, the remarks made on particular parts, with the names of the towns, their distances asunder, &c. with proper references to the sketches. The scale most proper for this purpose is two inches to a mile; if therefore, the sketch book be made six inches wide, and the leaves divided by lines into three equal parts, each division will be one mile, which will be a sufficient scale for the purpose.

1st. Roads.—The principal points to be attended to in examining roads for military purposes, are, their direction; the villages, countries, and rivers, which they pass through; the roads which cross them; their names and the seasons in which they are in best condition; and if ever impassable, their breadth, whether variable or constant; their bottoms, of what principally formed; their ascents and descents, whether practicable for all kinds of carriages. The enclosures may be hedges, ditches, walls, or fences. If the roads require repair for the transport of artillery, and other heavy carriages, observe if the necessary materials are at hand. If they pass over rivers, remark whether by bridges or fords; if through marshes, whether by causeways or otherwise. If two or more roads pursuing the same route, and by which different columns may march, at any part join or cross each other, it will be necessary to observe, whether the march of the columns will be thereby impeded. If they only cross each other, it will be sometimes possible in hollow ways, to throw a temporary bridge across the deepest, by which one column may pass over and the other under the bridge, without interrupting each others march.

2. Fords.—A ford for cavalry ought not to be deeper than 4 feet; for infantry not more than 3 feet. Observe the banks of the ford at each side; their form, steepness, and height; their situation as to the turnings of the river. Their bottom, whether passable for carriages. Observe marks by which the ford may be readily found; points from which it may be protected. Notice the rapidity of the water; whether its height be variable; its direction, its breadth, and the means by which the ford may be destroyed or rendered impassable.

3. Inundations.—Learn the manner of working the sluices; the time in which the inundation may be effected; its extent and depth. Observe how the dam may be protected; its height and solidity; whether it can be easily raised, or easily destroyed; whether it is commanded by distant positions, and whether the inundation can be otherways drained. Notice the adjacent country.

4. Springs and Wells.—Attend to the quality and quantity of the water; whether it will serve for the cavalry, as well as infantry, and the manner of its being drawn. Observe the situation of the spring, and of its source, whether it can be protected, and the enemy prevented from cutting it off.

5. Lakes, Marshes, and Swamps.—Learn their cause; if arising from a moist soil, the overflowings of rivers or from springs. Observe their situation, and the appearance of the surrounding country; the best means of crossing them. If they are divided by causeways, notice their breadth and condition; if not, remark if causeways can be easily established, and whether the swamp can be drained, and whether it is passable at any season of the year. Observe the points from which the causeways can be defended against the passage of an enemy’s column. Learn whether or not the swamps are subject to fogs; and at what seasons they are most hurtful.

6. Of Woods and Forests.—Remark their extent; their situation; their thickness; whether the trees are lofty or low; whether there is much underwood. Observe if the different clumps form openings or passes; and their extent; whether their sides are formed of thick wood or brush; whether their breadth is uniform, or widens at particular parts. Remark whether the ground of the forest be level or hilly, swampy or dry. Observe the nature and condition of the roads (for remarks to be made on these, see the article Roads;) observe also the means the forest affords of intrenching; of making fascines, abbatis, &c. Attend to the face of the country round the forest, whether cultivated fields or meadows: whether it affords positions; is intersected by rivulets, swamps or ravines.

Remark the castles, villages, towns, &c. in the neighbourhood; and their distance from the skirts of the wood.

Go round the wood and examine its principal débouchés; observe the ravines, rivulets, roads, &c. issuing from it, and learn their direction.

7. Heaths.—Notice for what nature of troops they are best calculated. The nature of hedges and brush wood; some form a good breast work. Observe the directions of the rivulets, roads, and ravines. When the ground of a heath is of the common colour, the roads are usually good: but when it is blackish and mixed with white sand, the roads are generally impassable in winter seasons.

8. Canals.—For this article see also the observations on Rivers. Observe their intention; the nature of the soil in which they are dug, their breadth and depth; their locks; the craft found upon them; the best means of protecting or destroying them: learn the countries they pass through.

9. Rivers.—Learn in what country they arise, and where empty themselves; the nature of the countries they run through, and whether they belong to us or the enemy. Learn the extent to which they are navigable; and if they ever freeze over, whether strong enough to bear troops and carriages. Notice the quality of the water, its course, currents, depths, and breadths. The banks and the beds of the rivers. Observe the nature and number of the craft that navigate them; and the mills upon their banks, whether of wind or water. Visit the bridges and fords; and make the proper remarks on their nature and situation. Learn whether the rivers ever overflow their banks, and at what season; and whether or not this causes inundations. Observe the most favourable points for crossing, and the roads leading to these points. The turnings and windings of the rivers, the form of their peninsulas; and the most favourable situations for throwing over bridges. If there are any wharves on the banks, observe what craft can lay along side of them.

If there are islands in the rivers, note their size; their banks; whether inhabited, cultivated, woody, or barren; and whether they command the channel.

Observe the mountains and high grounds near the rivers; remark their distance from the banks, and the advantages, or disadvantages which they offer. Learn what branches or confluence of other rivers there are either above or below, the best situations for crossing. Examine the positions which the adjoining country affords an army to protect the passage of the river; and whether in a perpendicular or parallel direction; and the routes by which 3 or 4 columns may arrive at the place.

10. Passes.—Observe their breadth, their length, their situation; the nature of the adjacent country: the best positions to occupy to cover a retreat; or to dispute the pass. How the troops would be best arranged; and the number that would be required for this purpose.

11. Ravines, Vallies.—Observe the nature of the soil; whether rocky, or of loose flints. If the sides are rugged and steep, whether they can be easily scarped off. The points that command them: whether storms or floods are to be apprehended; and at what seasons most expected.

12. Cultivated Lands.—Notice their state of cultivation: their productions; their time of harvest. Learn what quantity of wheat, rye, barley, oats, or other grain they produce, over and above the necessary subsistance of the inhabitants. How much hay they yield per acre.

13. Orchards.—Observe whether they are thick planted and afford a good cover: their enclosures, whether hedge, ditches, walls, &c.

14. Bridges.—Remark their situation; their length and breadth; the materials of which they are built; their strength, whether sufficient to bear artillery: the roads leading to them: their situation, as to the turnings of the river: their purpose; if to connect towns or villages, the nature, direction, and breadth of the streets leading to them. Observe the country around, whether flat or commanding: study the best means of fortifying the bridge head; and observe the best and most expeditious mode by which the bridge may be destroyed, if necessary.

15. Mountains, Hills.—Amongst high mountains, such as the Alps, roads are very rare; it is seldom more than the vallies that are inhabited and accessible for troops: observe their slopes, if steep or rugged. Examine the positions; means of gaining the summits; and note the state of cultivation and general appearance of the vallies; the pasturage, forage, cottages, villages, castles, roads, paths, and passes. Distinguish the principal chains of hills and their direction. Their relative heights; whether they are sufficiently extensive to form a line of defence; their communications; their strong points; positions proper for batteries, &c. Whether practicable for cavalry and artillery.

16. Coasts.—Their nature; whether bordered by downs; surrounded by rocks, which render their approach dangerous; or by shoals, which make their access impracticable; note the points and headlands proper for forts and batteries to defend the anchorage, ports, harbours, or other accessible parts. If there are any adjacent isles, perhaps they will serve for the erection of advanced batteries, to form a barrier to the efforts of an enemy. Observe the nature of the shores, bays, roads for shipping, &c. with the winds required to go in and out the harbours; and whether they are of easy access: their advantages and disadvantages, their size and depth of water. If a river empties itself on the coast, observe the particular channel for shipping, and whether it can be defended by any of the batteries. If the coast is already fortified, observe all the batteries, forts, or intrenchments, established for its defence, and the protection of the anchorage, &c. Examine the camps and other military posts, which cover the principal points, and the interior of the country. Estimate all the dangers to be run, and all the obstacles to be overcome in a descent, and point out the means of augmenting them. Observe the time of the tide most favourable for approaching the coast. Ascertain the number of artillery and other troops constantly on the coast, and the force that can be collected at a short notice; and how soon they can be drawn to any particular point attacked. Examine the system of defence adopted, and endeavour to improve it.

17. Forts, Redoubts.—Remark their form, whether ancient or modern; whether they are permanent or temporary; elevated or low; revetted or demi-revetted, with stone, brick, or turf. Whether the ditch is wet or dry; fraized or palissaded; natural or artificial. Observe their situation; the face of the adjacent country; whether they effectually command the passes, or protect the country intended. The defence they are capable of making in their present state, and the improvements of which they are susceptible.

18. Castles, Citadels.—Their situation; their form; their extent; their object; the protection they give the city; their connection and communication with it. The present state of their defence, and the improvements of which they are susceptible. Their Souterraines.

19. Villages.—Observe their situation; ascertain the number of families they contain; the nature of the land; the quality and quantity of their crops; their markets; the suburbs that supply these markets; their beasts of burthen: their flocks, herds, poultry, &c. The number of their ovens; quality of the water; stile of houses, barns, stables, and sheep walks. The situation of the church; the nature of the church yard, and its enclosures. The wind and water mills. Observe whether the village is surrounded by hedges, ditches, banks, or walls; whether it can be easily intrenched. Its streets; roads leading to it; and the face of the surrounding country.

20. Cities not fortified.—Their situation; population; commerce; commodities; manufactures; the succours that may be drawn from them, as to men, horses, &c. Their squares and principal buildings. The defence they are susceptible of; whether they are surrounded by walls, old towers, ditches, &c. Their gates, and the roads leading to them. The face of the surrounding country.

21. Fortified Towns.—Their situation with respect to their position, and with respect to other towns in the neighbourhood, whether in the first or second line; the assistance which they can afford each other. The succours that may be drawn from them, or that may be thrown into them in case of a siege. The direction which such relief, whether of men or provisions, ought to take, according to the side attacked; whether they will serve as depots or hospitals. The state of the fortifications (see the word Fortification in the alphabet;) their nature; the strength of each front. The rivers in the neighbourhood; the surrounding country within the range of the guns. The form of investment; what lines will be required considering the nature of the country, and the positions; and the means the country affords of executing them. The advantages which the ground would afford between the glacis and the lines, either to the besiegers or besieged; the means of establishing the most certain communications between the different quarters of the army, and the means of cutting them off.

22. Positions.—Every military position ought to possess decided advantages of situation, and ought to be commanded in no part of its front, flank, or rear. All commanding grounds ought to be without the range of cannon. There are four principal objects to be attended to in the choice of a position: 1st. The advantages of the ground; 2d. The supplies for the army; 3d. The objects to be attained; and, 4th. The communications with the rear. The front of a position should be intersected by rivers, ravines, or broken ground, or any other obstacles which can prevent the enemy advancing in order of battle, and oblige him to pass through defilés; but a position becomes useless when the front is so covered by obstacles that the army cannot advance or move out of its camp when necessary; but no obstacles can be too great on the flanks. All obstacles which cover a position, or passes which lead to it, must be within the range of the artillery, or the enemy will pass them unmolested. In a flat country, where the ground does not afford commanding situations, a position is only more or less eligible, as being covered or protected by obstacles; these are very thick woods, in which there are very few roads; large rivulets which cannot be forded or passed without bridges; narrow roads; deep and broken ravines; ground much intersected with hedges, ditches, &c. but it is essential that all these obstacles should be under the fire of the artillery. It is always dangerous to occupy a position, which has its rear so covered by swamps, crossed by rivers or ravines, &c. as to render the retreat of the army difficult. The number of passes by which an army can retire must be examined and secured, and should never be less than 5 or 6. The rivers, brooks, &c. in front of a position, should never be depended upon for a supply of water, as the enemy may cut them off. The ground for a camp should not be too much intersected by hedges, ditches, or ravines, which occasion great intervals in the line, and obstruct the communications through the camp.

In an offensive position it is absolutely necessary that the army should not be too much confined by obstacles, but be at liberty to act in every direction; but in a defensive position, the fewer accessible points there are the better: and if the natural difficulties in front and flank are not sufficient to render an enemy’s attack dangerous, they must be increased by redoubts, intrenchments, abbatis, inundations, &c. The obstacles on the flanks, should also be of such extent that they cannot be easily turned, without the enemy makes a very great circuit; and consequently exposes his own flank, and weakens his line of communication. In case the enemy detaches a body to attack a defensive position in the rear; the front must be sufficiently strong to enable the general to oppose the enemy’s detachment, by a strong body from his own army. In short, the enemy must not be able by any manœuvre to force the army to quit its position. The want of wood or water, or other supplies absolutely necessary for an army, renders every other advantage of a position useless; nor, can a position be long tenable, that is far removed from its depots; and has not its intermediate posts perfectly secure from the attacks of an enemy. For further remarks upon positions, see the word Artillery in the Field.

RICOCHET—Firing is not confined to any particular charge or elevation; each must vary according to the distance and difference of level of the object to be fired at; and particularly of the spot on which it is intended the shot shall make the first bound. The smaller the angle is under which a shot is made to ricochet, the longer it will preserve its force and have effect, as it will sink so much the less in the ground on which it bounds and its tenacity will of course present so much less resistance to the shot’s progress. In the ricochet of a fortification of any kind, the angle of elevation should seldom be more than 10°, to throw the shot over a parapet a little higher than the level of the battery. If the works should be of an extraordinary height, the piece must be removed to such situation, and have such charge, that it can attain its object at this elevation, or at least under that of 13° or 14°, otherwise the shot will not ricochet, and the carriages will suffer very much. The first gun in a ricochet battery should be so placed as to sweep the whole length of the rampart of the enemy’s work, at 3 or 4 feet from the parapet, and the rest should form as small an angle with the parapet as possible. For this purpose the guns should be pointed about 4 fathoms from the face of the work towards the interior. In the ricochet of ordnance in the field, the objects to be fired at being principally infantry and cavalry, the guns should seldom be elevated above 3 degrees; as with greater angles the ball would be apt to bound too high, and defeat the object intended. For ricochet practice see the different pieces of ordnance, as Gun, Mortar, and Howitzer.

DURTUBIE.

See also the words Platforms and Battery.

ROCKETS.—Composition.

Old Proportion.

New Proportion.

lbs.

oz.

lbs.

oz.

Saltpetre

4

0

—

4

4

Sulphur

1

0

—

0

12

Charcoal

1

8

—

2

0

Composition for the Stars.

Mealed powder

0 lb.

8 oz.

Composition for rains

Saltpetre

8

0

to head sky rockets

Sulphur

2

0

is the same as the

Antimony

2

0

above for the rockets.

Isinglass dissolved

0

3½

Spirits of wine

1 pint.

Vinegar

1 quart.

General Table of Sky Rockets.

2 Pound.

1 Pound.

½ Pound.

¼ Pound.

Inch.

Inch.

Inch.

Inch.

Case

Exterior diameter

2.13

1.69

1.34

1.06

Interior diameter

1.529

1.214

0.961

0.761

Length before driving

15.97

12.67

10.05

8.25

Length of guage for the choke

1.5

1.25

1.0

0.75

Cylinders for

heading.

Diameter

2.84

2.25

1.79

1.39

Length

4.26

3.38

2.68

2.12

Cones for

heading.

Diameter

2.84

2.25

1.79

1.39

Height

4.26

3.38

2.68

2.18

Mallet for driving.—Weight

4 lb.

3   8 oz.

2   1

1   10

Nᵒ. of strokes

31

21

18

13

Copper Ladles for filling Sky Rockets.

- Length, 1½ the exterior diameter of the case.

- Diameter, equals the interior diameter of case.

- Circumference, ¾ the interior caliber of the case.

Sky rockets are driven with composition up to 4½ exterior diameters of the case from the choke; and ⅕ of a diameter above the composition with good clay. They are bored and reamed up to 3½ diameters.

Dimensions of Sticks for Rockets.—General rules.

For rockets from ½ an ounce to one pound, the stick must be 60 diameters of the rocket in length: for rockets from one pound and upwards fifty or fifty two diameters. Their thickness at top about ½ a diameter, and their breadth very little more. Their square at bottom equal to ½ the thickness at top.

Nature of

Rockets.

6 Pr.

4 Pr.

2 Pr.

1 Pr.

½ Pr.

¼ Pr.

⅛ Pr.

Ft.

In.

F.

I.

F.

I.

F.

I.

F.

I.

F.

I.

F.

I.

Distance of poise

from the point

of the cone

4

1½

3

9

2

9

2

1

1

10½

1

8

1

3

Rockets of between 3 and 4 inches diameter have been observed to ascend as high as 1000 or 1200 yards; but the height of common rockets is between 450 and 600 yards; and their flight usually short of 7 seconds.

JONES, ROBINS, LAB.

ROPE—is always distinguished by its circumference: thus a two inch rope means a rope of 2 inches in circumference.

Rule for finding the Weight of Ropes.

Multiply the square of the circumference in inches, by the length in fathoms, and divide the product by 480 for the weight in cwt. See also Drag Ropes.

S AND BAGS—are made about 27 inches long, and 15 diameter; 250 of these are required for each fathom of battery, or about 1680 for two guns or mortars.—See Tonnage.

SAP.—The sap generally commences about the second parallel, and sometimes sooner; and if the fire of the besieged is much slackened, may proceed both day and night. The sappers are usually divided into brigades of 8, and subdivided into divisions of 4 each; being the greatest number that can work at the sap at the same time. The leading sapper excavates 18 inches deep, and as much wide; the second, third, and fourth deepen the trench, each in succession 6 inches, and widen it as much; so that the four make a trench of 3 feet wide and 3 feet deep; after which the common workmen follow, and increase it in breadth and depth equal to the other trenches. The sap may proceed at the rate of 80 fathoms in 24 hours. As this work is very hard, the half brigades relieve each other every hour, and each sapper in his turn takes the lead. The whole brigade is relieved at the end of 6 hours. It is always customary in this dangerous work, to give the wages of those that are killed to the survivors. Sappers are generally armed with a helmet and breast plate. See Trenches, Parallels.

SECANT.—See table at the end of the word Gunnery.

SHELLS—For Mortars and Howitzers.—Their Dimensions, Weight, &c.

Nature.

Weight.

Diameter.

Powder

contained

in Shells.

Powder

for

Burning.

Diameter of

Fuze Hole.

Thickness

of Metal.

Outside

Inside

Ct.

qr.

lbs.

oz.

Inches.

lbs.

oz.

lbs.

oz.

Inches.

Inches.

Inches.

13 Inch

1

3

2

12¾

10

4

6

12

1.837

1.696

2.05

10 ”

3

9

9¾

4

5

2

10

1.57

1.45

1.575

8 ”

1

11½

7¾

2

12

1

14

1.219

1.127

1.2

5½ ”

15¼

5¼

1

12

0.894

0.826

0.822

4⅖ ”

8

4⅕

7

5

0.832

0.769

0.653

Hand

3

11

3.49

Gren.

1

13

2.77

1½

French Shells, in French Weights and Measures.

Inches.

lbs.

Lines Po.

Lines Po.

Lines

12 Inch

150

12

17

5

15    9

15

16

10 ”

100

10

10

3

15    9

15

16

8 ”

43

8

4

1

1

12

11

10

6 ”

23

6

2

8

12

11

10    6

10

Dimensions of Shells for Guns and Carronades

made with an equal Thickness of Metal.

Nature.

42 Pr.

32

24

18

12

Inches

Inches

Inches

Inches

Inches

Guns

Diameter of the shell —

Exterior

6.684

6.105

5.547

5.04

4.4

Interior

4.404

4.005

3.767

3.4

2.8

Thickness of metal

1.14

1.05

0.89

0.82

0.8

Diameter of fuze hole —

Exterior

0.894

0.894

0.894

0.832

0.832

Interior

0.826

0.826

0.826

0.769

0.769

Powder for bursting

oz.

14

11

12

9

5½

Carronades

Diameter of the shell —

Exterior

6.64

6.05

5.48

4.935

4.295

Interior

4.36

3.95

3.48

3.235

2.695

Thickness of metal

1.14

1.05

1.

0.85

0.8

Shells Weight

lbs.

22

12

Contains powder

oz.

12½

9

Powder for bursting

oz.

10

7

The following Shells may also be fired from Guns.

Hand

Grenades

from

6

Prs.

4⅖

Shells

”

12

Prs.

5½

Shells

”

24

Prs.

8

Inch

”

68

Pr. Carronades.

Shells may likewise be thrown from guns to short distances, in cases of necessity, though the bore be not of a diameter sufficient to admit the shell. For this purpose the gun may be elevated to any degree that will retain the shell upon its muzzle, which may be assisted by a small line going from the lugs of the shell round the neck of the gun. To produce a greater effect, the space between the shell and the charge may be filled with wads or other substance.

LOMBARD.

Shells are likewise sometimes quilted into grape. See the word Shot.

For the method of proving shells. See Proof.

To find the Weight of a Shell of Iron.

Take ⁹/₆₄ of the difference of the cubes of the external and internal diameters for the weight of the shell.

To find how much Powder will fill a Shell.

Divide the cube of the internal diameter of the shell in inches by 57.3, for the pounds of powder.

To find the size of a Shell to contain a given Weight of Powder.

Multiply the pounds of powder by 57.3, and the cube root of the product will be the diameter in inches.

The Germans do not name their shells from the diameter of the bore which receives them, but from the weight of a stone ball that fits the same bore as the shell. Thus a 7 lbs. howitzer admits a stone ball of that weight; the shell for this weighs 15 lbs. and answers to the English 5½ inch. The 30 lbs. howitzer shell weighs 60 lbs. and is rather more than 8 inches in diameter.

Note.—Shells were till lately made thicker at the bottom than at the fuze hole; but are now cast of the same thickness throughout, and are found to burst into a greater number of pieces in consequence.

SHOT.—Rules for finding the Number in any Pile.

Triangular Pile.

Multiply the base by the base + 1, this product by the base + 2, and divide by 6.

Square Pile.

Multiply the bottom row by the bottom row + 1, and this product by twice the bottom row + 2, and divide by 6.

Rectangular Piles.

Multiply the breadth of the base by itself + 1, and this product by 3 times the difference between the length and breadth of the base, added to twice the breadth + 1 and divide by 6.

Incomplete Piles.

Incomplete piles being only frustrums, wanting a similar small pile on the top, compute first the whole pile as if complete, and also the small pile wanting at top; and then subtract the one number from the other.

Rules for finding the Dimensions and Weight of Shot.

The weight and dimensions of shot or shells might be found by means of their specific gravities; (see the word Gravity;) but they may be found still easier, by means of the experimented weight of a ball of a given size, from the known proportion of similar figures, namely as the cubes of their diameters.

1st. To find the Weight of an Iron Ball from its Diameter—An iron ball of 4 inches diameter weighs 9 lbs. and the weights being as the cubes of their diameters, it will be as 64, (the cube of 4,) is to 9, so is the cube of the diameter of any other ball to its weight.

2d, To find the Weight of a Leaden Ball.—A leaden ball of 4¼ inches diameter weighs 17 lbs. Therefore, as the cube of 4¼ is to 17, (as 9 to 2 nearly,) so is the cube of the diameter of any leaden ball to its weight.

3d, To find the Diameter of an Iron Ball.—Multiply the weight by 7¹/₉ and the cube root of the product will be the diameter.

4th, To find the Diameter of a Leaden Ball.—Multiply the weight by 9, and divide the product by 2; and take the cube root of the quotient for the diameter.

Table of Diameters of English Iron Round Shot.

Nature.

68

42

32

24

18

12

9

6

3

1

Inches.

8.

6.684

6.105

5.547

5.040

4.403

4.000

3.498

2.775

1.92

Diameters of French Iron Round Shot

in English Inches.

Nature.

36

24

16

12

8

7

Inches.

6.648

5.808

5.074

4.610

4.027

3.196

Table of English Case Shot for different Services.

Sea Service.

Carronades.

Nature.

Weight

of each

Shot.

Number

in each

Case.

Weight

of each

Case

filled.

Nature.

Weight

of each

Shot.

Number

in each

Case.

Weight

of each

Case

filled.

Prs.

oz.

Nᵒ.

lbs.

oz.

Prs.

oz.

Nᵒ.

lbs.

oz.

32

8

70

33

8

68

8

90

46

2

24

8

42

22

15

42

8

66

32

8

18

6

42

16

8

32

8

40

21

4

12

4

42

11

5

24

8

32

16

1

9

3

44

8

9

18

6

31

12

2

6

2

40

5

2

12

4

32

8

2

4

2

28

4

—

Tier Shot for Field

Service.

3

2

20

2

15

1

1¼

12

2

2¼

Common Land Service.

oz.

Nᵒ.

lbs.

oz.

12 Pr.

18

15

18

8

Med.

6½

42

17

11

Prs.

oz.

Nᵒ.

lbs.

oz.

6 Pr.

8½

15

9

—

24

4

84

21

11

Med.

3½

42

8

14

12

2

84

12

1

3 Pr.

4½

15

4

10

6

1½

55

5

10½

Med.

1½

42

4

6

12 Pr.

14

12

14

14

Light

6½

34

14

11

6 Pr.

8½

12

7

3

Light

3½

34

7

7

3 Pr.

4½

12

3

10

Light

1½

34

3

11

For Mortars.

Howitzers.

Nature.

Weight

of each

Shot.

Number

in each

Case.

Weight

of each

Case

filled.

Weight

of each

Shot.

Number

in each

Case.

Weight

of each

Case

filled.

Inch.

oz.

Nᵒ.

lbs.

oz.

oz.

Nᵒ.

lbs.

oz.

10

8

170

91

8

—

—

—

—

8

6

90

38

4

6

90

33

8

5½

3

55

12

6

3

55

12

8

4⅖

2

55

8

1¼

2

55

8

2

Table of Grape Shot, for

Sea and Land Service.

Nature.

Weight of

each shot.

Total Weight of

the grape

complete.

lbs.

oz.

lbs.

oz.

42

Pounders.

4

0

46

6

32

”

3

0

34

1

24

”

2

0

25

5

18

”

1

8

19

15½

12

”

1

0

10

15

9

”

0

13

7

6

6

”

0

8

5

8½

4

”

0

6

3

14½

3

”

0

4

2

10½

½

”

0

⅗ lead

8¾

Small shells, as 4⅖ inches, and hand grenades were quilted into grape for 13 inch mortars at Gibraltar. The fuzes were turned inwards next the iron tampion, and leaders of quick match for communicating fire to the fuzes were introduced through holes made in the wood bottom, and placed as near the fuzes as possible in the center of the grape. These answered very well for short ranges.

SHAND.

Hot Shot.—The powder for firing with hot shot must be in strong flannel cartridges, without any holes, lest some grains should remain in the bore, in putting the cartridge home. Over the powder must be rammed a good dry wad, then a damp one, and then the hot shot; and if the gun lays at a depression, there must be a wad over the shot, which may be rammed home. If the above precautions be attended to, the gun may be pointed after being loaded, without the smallest danger; as it is well known that the shot will grow cold in the gun, without burning more than a few threads of the wads next it. This is not the mode usually taught of loading with hot shot, but is that which was practised during the siege of Gibraltar. Mr. Durtubie proposes putting the shot when heated, into a tin cannister, as an effectual method of preventing accidents.

The grates usually made for heating shot will generally make them red hot in ¾ of an hour.

SINES.—See table of Natural Sines, at the end of the word Gunnery.

SOUND.—The medium velocity of sound is nearly at the rate of a mile, or 5280 feet; in 4⅔ seconds; or a league in 14 seconds; or 13 miles in one minute.—But sea miles are to land miles nearly as 7 to 6: therefore sound moves over a sea mile in 5¾ seconds nearly; or a sea league in 16 seconds.

HUTTON.

Sound flies 1142 feet in one second.

FLAMESTEAD.

It is a common observation, that persons in good health have about 75 pulsations at the wrist in a minute, consequently in 75 pulsations sound flies about 13 land miles, or 11¹/₇ sea miles, which is about 1 land mile in 6 pulsations, and 1 sea mile in 7 pulses; or a league in 20 pulses.

HUTTON.

The velocity of sound does not very much vary, whether it goes with the wind or against it. As sound moves vastly swifter than the wind, the acceleration it can thereby receive can be but inconsiderable; and the chief effect we can perceive from the wind is, that the sound will be carried to a greater distance by it. Sound will be louder in proportion to the condensation of the air. Water is one of the greatest conductors of sound: it can be heard nearly twice as far as on land.

HUTTON.

STOPPAGES.—There shall be stopped out of the pay of an artillery soldier, (beer money included,) the sum of 5 shillings and one penny per week, to be applied towards the expense of his mess, (including vegetables, &c.) A sum not exceeding one shilling and six-pence per week shall be retained for necessaries to be accounted for, as usual, monthly. The remainder amounting to 3s. 10¾d. per week, shall be paid to the soldier, subject to the accustomed deductions for washing, &c. or articles for cleaning his cloaths and appointments. Stoppages for rations for man and horse. See the word Ration.

T ANGENT—See the table of natural tangents at the end of the word Gunnery.

Tangent Scale.—.21 of an inch is the tangent of 1 degree to every foot of a gun’s length, from the base ring to the swell of the muzzle: Therefore if the distance in feet, between these two points be multiplied by .21, the product will be the tangent of 1 degree; from which the dispart being subtracted, will give the length of the tangent scale above the base ring for one degree of elevation for that particular gun. If the scale is to be applied to the quarter sight of the gun, of course the dispart need not be subtracted.

Tangent of 1 Degree to the following Ordnance.

Length.

Tangent, 1°

Dispart.

Feet.

In.

Inches.

Inches.

12

Pr.

Medium

6

6

1.365

1.475

12

Pr.

Light

5

—

1.05

1.

6

Pr.

Heavy

7

—

1.47

1.32

6

Pr.

Light

5

—

1.05

1.

3

Pr.

Heavy

6

—

1.26

1.08

10

Inch

Howitzer

3

11½

.84

—

8

”

”

3

1

.64

—

5½

”

Light

2

2¾

.47

—

4⅖

”

”

1

10

.384

—

Tangent of 1 Degree to the following French Guns.

Nature of

Ordnance.

Siege.

Field.

Tangent

of 1°

Dispart.

Tangent

of 1°

Dispart.

In.

Li.

P.

In.

Li.

P.

In.

Li.

P.

In.

Li.

P.

24

Pounder

2

1

5

1

2

4

—

—

16

”

2

—

—

1

1

—

—

—

12

”

1

10

6

1

—

—

1

4

—

1

3

2

8

”

1

8

3

1

—

—

1

2

—

1

2

—

4

”

—

—

1

—

—

1

—

—

6

In. How’r.

—

—

0

5

6

—

As the French tangent scales are marked off in inches and lines, the above dimensions are given in the same, for the more ready turning the French elevations into degrees, and thereby comparing their ranges with the English.

TENT for Laboratory Works.—Weight complete with poles, pins, &c. 3 cwt. 24 lbs. length of ridge pole, 18 feet; length of poles, 14½ feet.

Bell Tent, now used for infantry or cavalry; weight, complete with poles, 43 lbs. length of pole, 9 feet, contain 12 men each, require 40 pegs.

Common Infantry Tent.—Length of ridge pole 7 feet; length of standards 6 feet. They hold only 5 men each. Weight complete 27 lbs.

Marquee.—Weight complete,1 cwt. 17 lbs. ridge pole, 7 feet; standard, 8 feet.

TONNAGE.—The usual method of finding the tonnage of any ship is by the following rule: Multiply the length of the keel by the breadth of the beam, and that product by half the breadth of the beam; and divide the last product by 94, and the quotient will be the tonnage.

Ship’s keel 72 feet: breadth of beam 24 feet.

(72 × 24 × 12)

= 220.6 tonnage.

94

The tonnage of goods and stores is taken sometimes by weight and sometimes by measurement; and that method is allowed to the vessel, which yields the most tonnage. In tonnage by weight, 20 cwt. make 1 ton. In tonnage by measurement 40 cubic feet equal 1 ton. All carriages, or other stores to be; measured for tonnage, are taken to pieces, and packed in the manner which will occupy the least room on board ship. All ordnance, whether brass or iron, is taken in tonnage by its actual weight. Musquet cartridges in barrels or boxes; all ammunition in boxes; and other articles of great weight are taken in tonnage, according to their actual weight.—See also the word Embarkation.

The following is the tonnage required for some of the most material ordnance stores.

Tonnage of Ordnance.

Nature.

Nᵒ.

T.

ct.

qr.

Axes, complete

with handles

Pole

264

—

10

0

Pick

100

—

9

0

Felling

176

—

14

0

Barrows—

Wheel

packed

20

2

2

0

”

unpacked

7

1

0

0

Hand,

single

20

0

18

0

Budge barrels

32

1

0

0

Bricks

1000

2

5

0

Buckets of leather

20

0

2

0

Pontoon and carriage complete,

with its appurtenances

11

0

0

Carbines.—

A chest with 25 stand

is 11 feet cubic

Carriages.—

Standing

42 Prs.

1

13

0

32 Prs.

1

10

0

Howitzer

10 Inch.

1

10

0

24 Prs.

1

9

8

Howitzer

18 Prs.

1

7

0

8 Inch.

12 Prs.

1

4

0

9 Prs.

1

3

0

6 Prs.

1

0

0

4 Prs.

0

17

0

Carriages.—Travelling,

complete with limber

boxes, ladles, sponges

and rammers

24 Prs.

5

10

0

12 Prs.

4

10

2

9 Prs.

4

7

2

6 Prs.

3

7

2

3 Prs.

2

19

0

Medium

24 Prs.

2

9

2

12 Prs.

6  Pr. light, with ammunition boxes

2

3

0

5½ Inch howitzer,       ”        ”

5½ Howitzer of 10 cwt.

Carriages

3

2

0

8   Inch Howitzer

3

7

2

Sling cart, complete

3

0

2

Forge cart, with limber

4

0

0

Ammunition waggon

4

18

1

Gravel cart

2

16

2

Duke of Richmond’s close bodied waggon

5

0

0

Road waggon, with upright sides

7

10

0

Gin; triangle

0

14

0

Grate for heating shot

0

4

2

Handspikes

120

1

0

0

Handcrow levers, of 5 feet

120

1

0

0

Handscrews,

large

15

1

0

0

small

17

1

0

6

Helves,

pick or felling

300

0

14

0

”

sledge

300

1

0

0

”

pinmaul

360

1

0

0

Junk

20 cwt.

1

5

0

Linstocks,

without cocks

1000

1

0

0

with cocks

600

1

0

0

Musquets.—

A chest with 25 is 16 feet.

”

” with 20 is 11 feet.

Match

6 cwt.

1

14

0

Powder

11 whole barrels

1

0

0

22 half      ”

1

0

0

Pitch or tar.—1 barrel is 7 feet.

Pistols.—A chest with 50 or 60 = 10 feet.

Park pickets

40

0

9

1

Pikes

12 dozen

1

1

0

Sheep Skins

280

1

0

0

Shovels  of iron

100

1

0

0

Shovels, shod with iron

138

1

0

0

Sand bags

Bales

Bushel

500

0

12

0

½ ”

500

0

7

1

2 Bushel

250

0

8

1

The following is the tonnage allowed to the military officers of the ordnance embarked for foreign service, for their camp equipage and baggage:

For a field officer

5

tons.

For a captain

3

”

For a subaltern

1½

”

12th June, 1799.

TRANSPORTS.—See the word Embarkation.

TRENCHES.—A general term for all the approaches at a siege of a fortified place.

The approaches at a siege are generally carried on upon the capitals of the works attached; because the capitals produced are of all other situations in the front of a work the lead exposed to the fire of either the cannon or musquetry; and are the least in the line of fire between the besieged and besieger’s batteries. But if, from particular circumstances, these, or other advantages do not attend the approaches upon the capitals, they are by no means to be preferred to other positions.

The trenches of communication, or zig-zags, are 3 feet deep, 10 feet wide at bottom, and 13 feet at top, having a berm of one foot, beyond which the earth is thrown to form a parapet.

The parallels or places of arms of the trenches are 3 feet deep, 12 feet wide at bottom, and 17 or 18 feet wide at top, having a banquette of about 3 feet wide, with a slope of nearly as much. See the word Sap.

The first night of opening the trenches, the greatest exertions are made to take advantage of the enemy’s ignorance as to the side of attack; and they are generally carried on as far in advance as the first parallel, and even sometimes to the completion of that work. The workmen set out on this duty, each with a fascine of 6 feet, a pick ax, and a shovel; and the fascines being laid so as to lap one foot over each other, leaves 5 feet of trench for each man to dig.

The usual method of directing the trenches or zig-zags, is by observing during the day some near object in a line with the salient parts of the work, and which may serve as a direction in the night; or if the night be not very dark, the angles of the works maybe seen above the horizon; but as both these methods are subject to uncertainty, the following is proposed, to answer every case: having laid down the plan of attack, the exact positions of the flanked angles of the works of the front attacked, and particularly of those most extended to the right and left, mark on the plan the point of commencement for the first portions of zig-zag; the point where it crosses the capital; and the point to which it extends on the other side of the capital: this last point will be the commencement of the second branch; then mark off the point where this branch crosses the capital and its extent on the other side; and this will give the commencement of the third branch; and so on for the others. Thus provided with a plan ready marked off, it will be very easy, even in the darkest night, to lay down the points where the zig-zags are to cross the capital, and the points to which they are to be produced beyond them. The first parallel is generally run about 600 yards from the place, and of such extent as to embrace the prolongations of the faces of all the works which fire upon the trenches; and each end has a return of about 30 or 40 yards.

The second parallel is constructed upon the same principles, and of the same extent as the first; at the distance of about 300 yards from the salient angles of the covert way. This parallel is usually formed of gabions, each workman carrying a gabion, a fascine, a shovel, and a pick ax. After this the trenches are usually carried on by sap.—See that word.

The half parallels are about 140 or 150 yards from the covert way, and extend on each side sufficient to embrace the prolongation of the branches of the covert way.

The third parallel must not be nearer than the foot of the glacis, or it will mask the ricochet batteries. It is generally made rather wider than the other parallels.

Cavaliers of the trenches must not be nearer than 28 yards from the covert way, or they will be liable to be annoyed by hand grenades.

See likewise the words Approaches, Sap, and Battery.

TROU DE LOUP—A cone reversed. Diameter of the base 4 feet 6 inches; depth 6 feet; picket 6 feet long, and from 4 to 5 inches square; contain ¾ of a cubic fathom of earth, and are usually placed 2 in 3 fathoms.

TUBES—of tin plates are the best for service. Tubes must pass through a gauge of ²/₁₀ of an inch diameter. The composition is mealed powder, mixt up stiff with spirits of wine. They are made up in bundles of 100 each.

Length of Tin Tubes.

Length.

Nature of Ordnance.

Heavy.

Medium.

Light.

Howitzer.

Land Mortars.

Sea Mortars.

Inches.

Pr.

Pr.

Pr.

Inch.

Inch.

Inch.

12.2

—

—

—

—

—

13

8.8

24

24

—

—

—

—

8.2

18

18

—

—

—

—

7.75

12

12

—

—

13

10

6.8

9

9

—

—

—

—

6.5

6

—

24

8

10

—

5.9

3

6

12

5½

—

—

5.0

—

—

—

—

8

—

4.75

1½

1½

6

—

—

—

4.2

—

—

—

4⅖

5½

—

3.6

—

—

—

—

4⅖

—

Note.—If tin tubes get damaged by wet, the composition may be cleared out of them, and they may be fresh filled. If spirits of wine cannot be had, good rum or brandy will answer the purpose.

U NIFORMS—

Principal Colour of the Military Uniforms of the different Powers of Europe.

NATIONS.

Cavalry.

Infantry.

Artillery.

Remarks.

Imperial

White

White

Grey

Russian

Blue

Green

Green

Black cockades.

Danes

—

Red

—

English

Blue

Red

Blue

French

Blue

White

Blue

Nati’l. cockades.

Poland

Blue

Blue

Blue

Prussian

White

Blue

Blue

Drag. light blue.

Sardinian

Blue

Blue

Blue

Sweden

—

Blue

—

Yellow cockades.

Bavaria

—

White

Grey

Hanover

Blue

Red

mixt Blue

Green cockades.

Mayence

—

White

”

Palatine

Crimson

clear Blue

—

Saxon

White

White

Green

Dragoons red;

white cock.

Anspach

Blue

Blue

Blue

Bade

—

Blue

—

Brunswick

—

Blue

—

Hesse

White

Blue

Blue

Nassau Sarlz

—

Blue

—

Saxe Cobourg

—

Blue

—

Saxe Gotha

Blue

Blue

Blue

Saxe Hildburg

—

Blue

—

Saxe Meemingen

—

Blue

—

Saxe Weimer

Blue

Green

Green

Wurtemburg

—

Blue

Blue

Holland

White

Blue

Blue

Berne

Red

Blue

Blue

Black and red

cockades.

Mecklenburg

Blue

Blue

Blue

V ELOCITY—Initial velocity of military projectiles, as ascertained by the experiments with the Ballistic pendulum at Woolwich, in 1788, 1789, and 1790. These experiments were made with shot of equal diameters, powder of equal strength, and under a mean height of the barometer; and shew,

1. That there is very little difference in the velocities of shot fired from guns of the same length, but of unequal weights; the advantage being sometimes in favour of one and sometimes of the other.

2. That velocities arising from firing with different quantities of powder, are nearly in the proportion of the square roots of the quantities or weights of powder.

3. That the velocities decrease as the distances increase, arising from the resistance of the air, which opposes the progress of the shot, in a proportion somewhat higher than the squares of the velocities throughout; and only to a small variation.

4. That very little advantage is gained in point of range, by increasing the charge more than is necessary to attain the object, the velocities given by large charges being very soon reduced to those by moderate charges: those for instance given by half the shot’s weight are reduced to an equality with those by one third, after passing through a space of only 200 feet.

5. That very little advantage is also gained by increasing the length of guns; the velocity given by long guns of 22 calibers length of bore, being reduced to an equality with those of the short guns of 15½ calibers with similar charges, after passing through the spaces as follows:

With

½

the

shot’s

weight

285 feet.

⅓

”

”

200

¼

”

”

150

⅙

”

”

115

6. That the resistance of the air against balls of different diameters with equal velocities, is very nearly in the proportion of the squares of their diameters; or as their surfaces.

7. That the velocity is not affected by compressing the charge more or less; or by heating the piece in different degrees.

8. That a very great increase of velocity arises from a decrease of windage; it appearing, that with the established windage; of ¹/₂₀ between ⅓ and ¼ of the force is lost.

9. It also appeared, that by firing the charge in different parts; by varying the weight of the gun to lessen the recoil; or even by stopping the recoil entirely, no sensible change is produced in the velocity of the ball.

10. That though the velocity of the shot is increased only to a certain point peculiar to each gun, (a further increase of powder producing a diminished velocity,) yet the recoil of the gun is always increased by an increase of charge.

11. Velocity of a light 6 Pr.—length, 4 feet 8 inches; charge, ⅓ the weight of the shot; 1558 feet per second.—6 Prs. heavy; 6 feet 8 inches; charge ⅓ = 1673 feet.

Velocity of a light 3 Pr. length, 3 feet 4 inches, charge ⅓—1371 feet per second.

Do. Heavy 3 Pr. length, 5 feet 9½ inches, charge ⅓ the shot—1584 feet.

HUTTON.

Velocity of French Ordnance.

24 Pr. charge 8 lbs. the eprovette mortar giving 125 fathoms, the initial velocity is 1425 feet per second; with the eprovette at 90 = 1209 feet; with a charge of 12 lbs. and the eprovette at 125; the initial velocity will be 1530.

Charge.

Eprovette.

Velocity.

16

Pr.

5 lbs

125

1415

”

”

8

”

1510

12

Pr.

4

”

long guns

1520

8

Pr.

2½

”

1418

”

”

3

”

1460

4

Pr.

1

”

1335

”

”

1½

”

1508

12

Pr.

4

”

field guns

1442

8

Pr.

2½

”

1422

4

Pr.

1½

”

1446

8

Inch

How’r.

1

”

390

”

”

”

1   2 oz.

”

516

6

Inch

How’r.

1

”

532

”

”

”

1   12

”

704

Lombard’s Tables.

VENT.—The vents of English guns are all ²/₁₀ of an inch diameter.—See remark 9 of the article Velocity.

W EIGHTS—See Measures.

WINDAGE.—The usual windage of English guns is ¹/₂₀ of the caliber. It appears by experiments, that ¼, or nearly ⅓ of the force of the powder is lost by this windage.—See remark 8 of the word Velocity.

Windage of Guns and Carronades.

Natures.

68

42

32

24

18

12

9

6

4

3

2

1

Guns

—

.33

.30

.27

.25

.22

.20

.17

.15

.14

.12

.09

Carrona.

.15

.15

.15

.14

.12

.12

Windage of Mortars and Howitzers.

From the 13 to 5½ inch the windage is .15 of an inch, and that of the 4⅖ is .2 of an inch.

Windage of French Guns.

Field Guns.—All one line of windage; about ¹/₅₀ in an 8 pounder.

Siege Guns.—All 1½ line; about ¹/₄₈ in a 24 Pr.

Mortars.—

12 Inch;

4 lines

of windage.

10 Inch;

1 line,

5 points

”

8 Inch;

1 line,

”

Howitzers.—

All;

2 lines

”

WOOD.—Artillery carriages are generally made of elm, ash, and oak. The bed and house of a sea mortar are made of oak, and the bolster of elm. The bottoms of land mortar beds are of oak, and the upper parts of elm.

Carriages—

Ship.—

The cheeks, transoms, and trucks of elm;

the axle trees of oak.

”

Garrison.—

The whole of oak; trucks, iron.

”

Field.—

Heavy 24 and 12 Pr. the cheeks and

transoms of elm; the axle trees of ash.

In the wheel the nave and fellies are

of elm; the spokes of ash; limber

shafts, bars, and axle trees are of

ash. Light guns, from 3 to 12 Prs. the

cheeks and transoms are of elm; the

ammunition boxes are of fir. In the

wheels, the nave is of elm, the spokes

of oak, and the fellies of ash. In the

limber the shafts and bars of ash.

THE END.

Footnotes:

[1] The 12 Prs. which have a small box on their limbers, carry 6 round shot and 2 case shot, with 6 cartridges of 4 lbs. and 2 of 3 1-2 lbs. of powder, more than the above proportion.

[2] A small limber box has lately been added to the medium 12 Prs. which carries 6 round shot and 6 case shot, with a small proportion of the small stores. See note page 11.

[3] Though the waggons will contain 20,000 cartridges, it is customary to load them with only 18 half barrels of 1000 each, and 2 half barrels of flints.

[4] For 16 Prs. in the French work, the compiler has said 18 Prs.—for 8 Prs. 9 Prs.—for 12 inch mortars, 13 inch; to which they nearly answer.

[5] Our iron mortars, on iron beds, all admit of being fired at low angles.

[6] A German author proposes that the mounds of earth which enable the guns to fire en barbette, should be so arranged, that the embrasures may be opened between them; and when the guns descend to the embrazures, the barbettes will serve as traversers.

[7] The compiler must here apologize for coining the word defiladed, which he is obliged to do, never having seen this subject treated of in English. But the French use the word defile in a contrary sense to enfile; and as we admit the words enfilade and enfiladed from the latter, we cannot refuse the terms defilade and defiladed from the former.

[8] This column expresses the number of pounds of metal in the guns, to each pound in the shot.

[9] See the word Shell for the principle on which the Germans class them in pounders.

[10] See the word Chambers, for Experiments on the best form.

[11] Stone Mortars should not be fired at a greater distance than 250 yards.

[12] For the Ranges with the 5½ inch Brass, see the Iron Mortars.

Transcriber’s Notes:

The cover image was created by the transcriber, and is in the public domain.

New original cover art included with this eBook is granted to the public domain.

Antiquated spellings were not corrected.

The illustrations have been moved so that they do not break up paragraphs and so that they are next to the text they illustrate.

Typographical and punctuation errors have been silently corrected.

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Table of Contents

THE BOMBARDIER, AND Pocket Gunner.

INDEX.

PREFACE.

THE FULL PROJECT GUTENBERG™ LICENSE