Ordnance and Gunnery. by Captain Lawrence L. Bruff (1896)

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Bruff, Capt. Lawrence L. A Textbook of Ordnance and Gunnery. New York: John Wiley & Sons (1896); 677 pages, 401 illus. Price 70.00 {Item No.2184} [Prepared for the Use of Cadets of the U.S.Military Academy. by Captain Lawrence L.Bruff. Ordnance Department, U.S.Army. Instructor of Ordnance and Gunnery at the U.S.Military Academy. First Edition.]

Chapter I. Gunpowder and Interior Ballistics

• Gunpowder; 30 pages, 6 illus. Price 3.00 {Item No.20521} [Includes: 1. Composition - manufacture, 2. Specific gravity and Gravimetric density, 3. Form of grain, 4. Inspection and proof of powder - history, 5. Combustion in air - laws, 6. Formula for burning in air of grains of different shapes, 7. Velocity of emission - spherical grains, 8. Velocity of emission for parallelopipedon and for pierced cylinder, 9. Size of grains - density - progressive powders, 10. Combustion in a close vessel - chemical formula - Noble and Abel's experiments, 11. Density of loading - Object of experiments, 12. Results - Nature and composition of products, 13. Results - Effect of variations in powder - Amount of heat generated - Volume of permanent gases, 14. Results - Pressure of gases - Formula, 15. Discussion of formula, 16. "Force" of powder - Temperature of explosion]
• Combustion of a Gun - Interior Ballistics; 74 pages, 21 illus. Price 8.00 {Item No.20522} [Includes: 17. Action of gunpowder in a Gun, 18. Equation of pressure curve - Noble and Abel's method, 19. Application of formula (43) - Work of gunpowder in a gun, 20. Equation of pressure curve - Recent hypothesis - Expression for work under this hypothesis, 21. Work of gunpowder in terms of force and weight of charge - Expression for it in terms of length of travel of projectile, 22. Division of work of gunpowder - velocity of recoil, 23. Velocity of projectile - Passive resistances - Limit of length of bore - Influence on velocity and maximum pressures, 24. Sarrau's formulas - General equation of motion of projectile in bore, 25. Transformation of equation (75) - Errors in its deduction and their correction, 26. Deduction of final equation of motion of projectile in bore, 27. Integration of equation (90) - Practical formulas for velocity and pressure - Values of A and B - Characteristics a and b, 28. Maximum pressure on breech on gun - Value of K, 29. Theoretical maximum velocity - Time of burning corresponding to the maximum velocity, 30. Modulus of quickness - value of modulus - Velocity and pressure as functions of this modulus, 31. Limit of use of binomial formula, 32. Monomial formula for velocity, 33. Calculation of the value of t, 34. Determination of the characteristics of a and b, 35. Effect of variation of elements of loading upon velocity and maximum pressure, 36. Change of velocity when maximum pressure remains constant - fixed powder chamber, 37. Relative variation of velocity and time of combustion - Of velocity and maximum pressure - Limits of modulus - Useful practical formulas, 38. Pressure curves in guns - Noble and Abel's method - Mayevski's method, 39. Longridge's method, 40. Pressure curve by Sarrau's formulas, Determination of velocity by experiment - General principles - Targets for cannon - For small arms, 42. The ballistic instruments - Description of the Le Boulenge chronograph, 43. Arrangement of wires - Working of instrument - Disjunction, 44. Arrangement of wires for small times - Disjunctor - Measuring rule, 45. Adjustments - Use - Objections to the instrument - Breger's improvements, 46. Schultz chronoscope - Marsel Deprez registers - Bashforth tragets, 47. Determination of pressures by experiment - Static method - Discussion - Conclusions, 48. Rodman and Noble gauges - Advantages of Noble, 49. Determination of pressures by the dynamic method - Noble and Abel's method - Letard's apparatus - Sebert's velocimeter]

Chapter II. High Explosives and Smokeless Powders

• High Explosives; 17 pages, 1 illus. Price 2.00 {Item No.20523} [Includes: 50. Definitions and classification, 51. Orders of explosion - Berthelot's theory - Detonators, 52. Modes of producing explosion - Fuses - Detonation by influence, 53. Strength of an explosive - Potential - Force - Rapidity of reaction, 54. Principal explosives - Gun cotton, 57. Nitroglycerine, 56. Dynamite - With inert base, 57. Dynamite with chemically active bases, 58. Picric acid and Picrates - Fulminates, 59. Nitro Benzines - Sprengel safety mixtures]
• Smokeless Powders; 15 pages Price 1.50 {Item No.20524} [Includes: 60. Changes in Black Powder - Early history of smokeless powders, 61. Modification of Gun cotton - Effect of calibre, 62. Operations in the manufacture of smokeless powder - Solution, 63. Compression and rolling - Cutting up - Drying, 64. Classification of smokeless powders - Classes 1, 2 and 3 - Weteren powder, 65. Powder B.N.F. - Ballistite - Cordite, 66. Leonard powder - Peyton powder, 67. Conditions to be fulfilled by smokeless powders - Smokelessness - Velocities and pressures - Stability, 68. Fouling - Sensitiveness - Safety and cost of manufacture - Character of products of explosion - Chemical action - Weight of charge and specific gravity, 69. Cause of ballistic superiority of smokeless powders]

Chapter III. Guns

• Gun Steel; 20 pages, 9 illus. Price 2.00 {Item No.20525} [Includes: 70. Definition of Gun metal - Chemical composition - Different consitituents and their effect, 71. Physical qualities - Hardness - Toughness - Elastic limit - Hooke's Law - Tensile strength, 72. Structure of steel - Defects - Blow holes - Pipes, 73. Working qualities of steel - Fusibility - Malleability and ductility - Welding - Annealing, 74. Manufacture of gun steel - Open hearth process - Gas producer and regenerators, 75. Manufacture of steel - The furnace - Operation - Crucible process, 76. Casting ingots - Ladle - Crane - Ingot mold - Pouring - Sinking head, 77. Whitworth's process of fluid compression, 78. Treatment after casting - Testing - Reheating - Forging - Cranes - Hammer, 79. Whitworth's hydraulic forging - The press - Mandrels, 80. Gun forgings - Treatment after forging - Annealing - Boring and turning - Oil tempering - Reannealing - Tests, 81. Brinell's experiments]
• Machines used in gun manufacture; 22 pages, 24 illus. Price 2.50 {Item No.20526} [Includes: 82. General principles of machines - Definition - How motion is transmitted and modified, 83. Rolling contact - Different forms of pieces in rolling contact, 84. Sliding contact - principles of teeth - Figures of teeth - Action, 85. Belts or bands - Rounded or crowning pulleys - Speed cones - Starting and stopping, 86. Linkwork - Cords and ropes - Hydraulic connection, 87. General arrangement of machine shops - Distribution of energy, 88. Machine tools - Shearing - Cutting - Scraping - Drills - Reamers - and Milling cutters, 89. Machine in general use - The Lathe - Parts, 90. The Lathe - Slide rest - Feed - Action, 91. The Planer - Parts - Action, 92. The Shaper - Parts - Action, 93. The Drill press - Parts - Action, 94. The Milling machine - Parts - Action]
• Gun Manufacture; 9 pages, 9 illus. Price 9.00 {Item No.20527} [Pages 176-184] 95. General description of modern guns - Parts - The forging - Division of operations, 96. Operations before assembling - Tube - Warping - First Boring - Tool - Second Boring - Tool, 97. Boring and turning Lathes - Back rests - Bore of tube - Turning, 98. Assembling - Furnace - Expansion - Cooling, 99. Operations after assembling - Finish boring - Rifling - Rifling machine - Rifling tool]
• Elastic Strength of Guns; 37 pages, 15 illus. Price 4.00 {Item No.20528} [Pages 185-221] 100. Definitions - Case considered - Redial stress and strain, 101. Tangential stress and strain - Longitudinal stress and strain - Conclusions, 102. Relations between stresses and strains when all the forces are tensions - Application to cube in gun cylinder, 103. Lame's First Law Connecting t, p, and q, 104. Lame's Second Law, 105. Curve of stresses in a cylinder - Discussion, 106. Conclusion from curves - Method of strengthening cylinder, 107. Values of the strains at any point in a cylinder in terms of the Radii and Pressures, 108. Maximum values of strains in a cylinder, 109. Limiting interior pressures - Discussion, 110. Limiting exterior pressures - Thickness of cylinder - Exterior strains, 111. Longitudinal strength, 112. General principles of built up guns - Method of applying exterior pressure, 113. Calculations for compound cylinder - States considered - Nomenclature, 114. Resistance of compound cylinder in action, 115. Longitudinal strength of compound cylinder, 116. The system of rest - Reasons for considering it - Variations of pressure, 117. Limiting value of exterior pressure on tube - System at rest, 118. Calculation of p, in equation (231), 119. True value of P, 120. Calculation of the shrinkage, 121. Measurements in gun construction - Thickness of wall - Length of bore, 122. Wire guns, 123. Description of wire guns - Woodbridge - Crozier - Brown segmental]
• Measurements; 12 pages, 12 illus. Price 1.50 {Item No.20529} [Includes: 124. Necessity for - Measurement required - Standard Comparator, 125. Measurements of interior diameters of short hoops - Measuring points - Use, 126. Measurement of interior diameters of long tubes - The star gauge - Setting the star gauge, 127. Exterior diameter - Calipers - Arm - Support - Action, 128. Measurement of lengths - Step gauge - Surface lengths, 129. General Principles of measurements - Touch - Interior diameters of short hoops, 130. Interior diameters of long hoops - Exterior diameters - Vernier scale]

Description of Cannon

1. In U.S.Service

• Mountain Guns; 4 pages, 3 illus. Price .50 {Item No.20530} [Includes: 131. Classification - Hotchkiss Mountain Rifle]
• Field Guns; 19 pages, 14 illus. Price 2.00 {Item No.20531} [Includes: 132. U.S. Field Artillery - 3.6 inch B.L. Mortar - 3.2 inch B.L. Field Gun, Light - 3.6 inch B.L. Field Gun, Heavy, 133. Breech mechanism of field artillery - Principle parts - The Breech lock, 134. The De Bange obturator - Action - Remarks, 135. The Freyre obturator - Action - Remarks, 136. Carrier ring - Object of latch, 137. Description of latch and its working, 138. The lever handle, 139. the vent cover, 140. Action of mechanism of 3.6 inch mortar]
• Siege Guns; 4 pages, 3 illus. Price .50 {Item No.20532} [Includes: 141. 5 inch Gun - 7 inch Howitzer - 7 inch Mortar]
• Coast Guns; 21 pages, 26 illus. Price 2.00 {Item No.20533} [Includes: 142. Calibres - Common Features - 8 inch Rifle, 143. The 10 and 12 inch Rifles, 144. 12 inch Steel Mortar - 12 inch Cast iron Mortar, Steel looped, 145. Breech mechanism - Block - Obturator - Anti friction washers and spring, 146. Apparatus for rotating and withdrawing the breech block - The tray - The translating screw, 147. Remaining parts of breech mechanism - Guide rails - Guide grooves - Side latch - Tray latch, 148. Vent cover - Action of breech mechanism, 149. Breech mechanism of 12 inch mortar, 150. Improved mechanism - Continuous rotation, 151. Old guns in U.S. service - 3 inch wrought iron rifle - 4.5 inch siege gun - 4.2 inch Parrott siege gun - 8 inch converted rifle - 15 inch Rodman smooth bore]
• Foreign Guns; 5 pages, 2 illus. Price .50 {Item No.20534} [Includes: 152. Foreign guns - Krupp mechanism - Locking screw, 153. The gas check - General features of the mechanism - Advantages and disadvantages]

Chapter IV. Projectiles and Armor

• Projectiles; 39 pages, 37 illus. Price 4.00 {Item No.20535} [Includes: 154. Classification - Solid shot - Chilled shot - Steel shot; 155. Shell - Definition - Shell for sea coast service - Deck piercing shell, 156. Siege shell - Field shell, 157. Case shot - Grape - Canister, 158. Shrapnel - Cone of dispersion - Causes which affect it, 159. Construction of spherical shrapnel - Early shrapnel - U.S. Spherical case - Boxer spherical shrapnel, 160. Oblong shrapnel - Boxer - Modern shrapnel - Position of bursting charge, 161. Description of modern shrapnel - Steel welded - Frankford arsenal, 162. Necessity for rotation of an oblong projectile - Energy of rotation required, 163. General discussion of the rotation of a projectile - Value of R, 164. Sectional density - How it may be increased - Effect of its increase on the gun, 165. Rifling - Kinds - Uniform - Increasing, 166. Twist in terms of calibre - Kinds of grooves, 167. Rotating devices - Studded system - Flanged system, 168. Expanding system - Hotchkiss, 169. Expanding system - Parrott - Eureka - Bulter, 170. Breech loading projectiles - First rotating device - Hotchkiss projectile - Copper bands, 171. Rotating device at present - Profile of band - Placing of band - Position, 172. Form of projectiles - Head - Spherical density - Weight, 173. Manufacture of projectiles - Pattern - Flask - Molding - Gate and riser, 174. Operation of casting - Kind of iron used - Position of head and base of projectile in mold - Steel projectiles, 175. Inspection and proof of projectiles - Quality of metal - Shape and dimensions - Eccentricity - Ballistic test]
• Armor; 11 pages, 6 illus. Price 1.00 {Item No.20536} [Includes: 176. Kinds of Armor, 177. Steel armor - History - Improvements - Latest steel plates - Harvey and Tresidder processes of surface hardening, 178. Effect of projectiles on armor - Early armor - Compound armor - Steel armor, 179. Backing - Fastening for old armor, 180. Improved fastenings for iron armor - For steel armor - Tests of armor plates, 181. Penetration of armor - Wrought iron - Steel]

Chapter V. Fuzes and Primers

• Fuzes; 15 pages, 9 illus. Price 1.50 {Item No.20537} [Includes: 182. Definition - Classification - Time Fuzes - Requisites - Difficulties, 183. Time fuzes - Difficulties, how overcome, 184. Older forms of time fuze in use - Mortar fuze - Sea coast fuze - Bormann fuze, 185. Percussion fuzes - Requisites - Essential parts, 186. Percussion fuze in U.S. Service - Classification - Hotchkiss front percussion fuze - Action of fuze - Safety devices, 187. Hotchkiss base percussion fuze - Action of fuze - Safety devices, 188. Combination fuzes - Requisites - Frankford Arsenal combination fuze - Action of fuze, 189. Delayed action fuzes - The Merriam delayed action fuze - Action of fuze]
• Primers; 5 pages, 4 illus. Price .50 {Item No.20538} [Includes: 190. Definition - Classification - Requisites - Common friction primer - Action, 191. Common electric primer - Action, 192. Obturating friction primer - Action, 193. Obturating electric primer -Action]

Chapter VI. Exterior Ballistics

• Exterior Ballistics; 28 pages, 3 illus. Price 3.00 {Item No.20539} [Includes: 194. Definitions, 195. Forces acting on a projectile - Circumstances of motion - Drift, 196. Form of trajectory - Causes affecting resistance - Form - Cross section - Density of the air, 197. Relation between velocity and resistance - Experiments, 198. Method of determining resistance, 199. Modification of general method - Results - Resistance, 200. Trajectory in air - Nomenclature - Equations of motion, 201. Method of integrating equations A - 1st Step, 202. Method of integration of equations (A) - 2d Step, 203. Simplification of equations (291), (292), and (293) - Method of calculating the functions which enter them, 204. Relation between x and y, 205. Modifications of general formulas for the whole range X - For the summit of the trajectory, 206. Auxiliary formulas, 207. Explanation of ballistic tables, 208. Auxiliary tables - Values of f (zV), z, and V, 209. Examples of use of auxiliary tables - Ballistic coefficient]
• Practical Problems; 15 pages Price 1.50 {Item No.20540} [Includes: 210. Kind of fire to which formulas apply - Problem I - Use of Equation D, 211. Problem 2. - Use of equations (316) and (321), 212. Problem 3 - Time of flight, 213. Problem 4 - Angle of inclination, 214. Problem 5 - Height of trajectory - Maximum height, 215. Problem 6 - To determine the dangerous space - Rule of double position, 216. Example, 217. Rigidity of trajectory - Drift, 218. Problem 7 - Mortar fire - Modified equations - Calculation]

Chapter VII. Artillery Carriages; Theory of Recoil

• Artillery Carriages; 20 pages, 19 illus. Price 2.50 {Item No.20541} [Includes: 219. Classification - Principle part of field and siege gun carriages - The axle, 220. The wheels - Parts, 221. Object of wheel - The stock, 222. The brakes - Friction brakes - Shoe - Hotchkiss - Lemoine - Nordenfelt, 223. Elastic brakes - Buffington - Englehardt - Belleville springs, 224. Hydraulic brakes - Elevating devices - The elevating screw, 225. Elevating devices - The toothed sector - The lever, 226. Draught - Modes of work of horse - Pack horse - Draught horse - Angle of traces, 227. Modes of attachment of horses - Attachment of traces, 228. Support of pole - Line of draught of traces, 229. Turning angle - Direction of carriage - Backing, 230. The harness]
• Carriages for Mountain and Field Artillery; 7 pages, 8 illus. Price 1.00 {Item No.20542} [Includes: 231. Carriage for Hotchkiss mountain gun - For 3.6 inch field mortar, 232. 3.2 inch field gun carriage, 233. The limber]
• Carriages for Siege Artillery; 4 pages, 3 illus. Price .50 {Item No.20543} [Includes: 234. 5 inch siege gun carriage, 235. 7 inch siege howitzer carriage, 236. 7 inch siege mortar carriage]
• Carriages for Seacoast Artillery; 16 pages, 18 illus. Price 2.00 {Item No.20544} [Includes: 237. Classification - Barbette carriage - Barbette carriage for 8 inch rifle - Principle parts - Base plate - Rollers and distance rings, 238. 8 inch barbette carriage - The chassis, 239. 8 inch barbette carriage - The top carriage and buffers elevating device, 240. The 12 inch mortar carriage - General features - Springs, 241. The 12 inch mortar carriage - Hydraulic buffers, 242. Remaining parts of the 12 inch mortar carriage - Roller paths - Elevating gear - Traversing gear - Loading scoop, 243. Casemate or turret carriages - General principles - Disappearing carriages - General principles, 244. Buffington - Crozier disappearing carriage, 245. The Gordon disappearing carriage, 246. Old seacoast carriages in U.S. service]
• Theory of recoil; 20 pages, 11 illus. Price 2.00 {Item No.20545} [Includes: 247. Maximum Velocity of Recoil, 248. Period of recoil - Relation between time, velocity, and length of recoil in first period, 249. Ordinary case - Steps in the solution of the problem, 250. First step - Time of passage of projectile over a given length of bore - Difficulty - Remedy, 251. Second and third steps in determining the curve of velocity of recoil as a function of the time, 252. Example - 8 inch steel B.L.rifle - First step - Curve t=f(u), 253. Examples - Second and third steps, 254. Problems, 255. Time and length of recoil in second period, 256. Curve representing total recoil - Application to 8 inch rifle. Second period, 257. Wheeled carriages - Cases, 258. To calculate the angle of elevation of the piece for which the wheels will rise]
• Brakes and Buffers; 13 pages Price 1.50 {Item No.20546} [Includes: 259. Necessity for means of checking recoil - Conditions which a good brake should fulfil - Classes, 260. Friction brakes for seacoast carriages - Objectives, 261. Hydraulic brakes - General description - Classification - Object of discussion, 262. Hydraulic brakes with constant orifice and variable resistance - Nomenclature - Value of total resistance opposing recoil, 263. Length of recoil with constant orifice, 264. Area of orifice for a given length of recoil with constant orifices - Pressure in cylinder, 265. Hydraulic brake with variable orifices and constant resistance - Reason for using it - Objects of discussion - Value of total resistance opposing recoil - 266. Length of recoil with variable orifice, 267. Maximum area of orifice for the brake with variable orifices, 268. Law of variation of areas of orifice for constant pressure in cylinder, 269. Profile of rib for constant pressure - Maximum pressure in cylinder]

Chapter VIII. Pointing; Probability of Fire

• Pointing; 40 pages, 32 illus. Price 4.00 {Item No.20547} [Includes: 270. Pointing, 271. Cases which may occur in pointing - First case - Height of rear sight - Corrections for drift, 272. Second case, 273. Third case - Errors - Fourth case, 274. Permanent angle of drift, 275. Indirect pointing, 276. Causes of deviations in pointing - Effect of wind, 277. Estimating distances - By the eye - By Sound - Le Boulenge telemeter, 278. Range finders - Principle - Class 1, 279. Range finders - Class 2 - Depression range finders - Range and position finder, 280. The Fiske range finder, 281. The Fiske position finder - Range by trail shots, 282. Effect of light - Errors of the eye - Errors in height of front and rear sights, 283. Motion of target - Rotation of the earth - Variations in ammunition, 284. Jump, 285. Description of sights for 8, 10, and 12 inch seacoast guns, 286. Gunner's quadrant for mortars, 287. Sights for siege artillery - For 7 inch howitzer, 288. Sights for field artillery - 3.6 inch mortar - 3.2 Field gun, 289. Deviations - How measured, 290. To find the centre of impact - Example, 291. Errors]
• Probability of Fire; 23 pages, 8 illus. Price 2.50 {Item No.20548} [Includes: 293. Division of sheaf of trajectories - Law of error - Probability curve - Principles upon which form of curve depends, 294. Equation of the probability curve - Properties of the curve - Limits, 295. Equation of the probability curve - Properties of the curve - Limits, 295. Modulus of precision h - Use of table I, 296. Probable error - True mean error - Relation between probable and true mean errors, 297. Probable zone - Examples - Comparison of mean and true mean errors, 298. 25 percent rectangle - Probable rectangle - Rectangles of any percentage, 299. Examples - Measure of accuracy of guns - Calculation of probable rectangle from mean error, 300. Use of probable error in calculating probabilities - Use of table II - Example, 301. Probability of hitting any plane figure, 302. Right line method, 303. Value of probability by the right line method]

Chapter IX. Portable Arms

• Portable Arms; 4 pages, 7 illus. Price .50 {Item No.20549} [Includes: 304. Division - Hand arms - Cutting arms - Principles - Light artillery sabre, 305. Thrusting arms - Principles - Straight sword - Bayonet - Lance - Cutting and thrusting arms - Cavalry sabre
• Small Arms; 37 pages, 20 illus. Price 4.00 {Item No.20550} [Includes: 306. Principal parts - The barrel - Calibre - Recoil, 307. Reduction of weight of bullet - First method - Decreasing the length, keeping the diameter constant, 308. Reduction of weight of bullet - Second method - Decreasing diameter, keeping length constant, 309. Reduction of weight of bullet - Third method - Changing length and diameter - Smokeless powder - Advantages of reduction of calibre - Flatness of trajectory, 310. Advantages of reduction of calibre - Decrease in weight of cartridges - Increase of accuracy of fire - Increased penetration, 311. Disadvantages of reducing the calibre, 312. Rifling - Pitch - Number of grooves and lands - Width - Depth - Direction of twist, 313. Profile of chamber - Thickness and length of barrel, 314. The receiver - General features - Receiver for Springfield rifle, 315. Receiver for Cal. .30, 316. Breech mechanism - General classification - Sliding mechanism, 317. Rotating mechanism, 318. Requirements of a good breech mechanism, 319. Breech mechanism of Springfield rifle, Cal..45, 320. Breech mechanism of the cal. .30 rifle - The bolt, 321. Breech mechanism Cal..30 - The sleeve - The extractor, 322. Firing mechanism - General Principles - Conditions for good firing mechanism - Firing mechanism of springfield rifle, 323. Firing mechanism of the Cal..30, 324. Sights - General principles - Position, 325. Sights for Springfield rifle - Sights for the Cal..30; 326. The stock and mountings]
• Repeating or Magazine Arms; 15 pages, 9 illus. Price 1.50 {Item No.20551} [Includes: 327. Advantages of magazine arms - Definition - Conditions to be fulfilled by a good magazine arm, 328. Classification of repeating mechanism - The detachable magazine - Lee magazine - Advantages and disadvantages of detachable magazines, 329. Fixed magazine - Classification - Description of the Jarmann magazine, 330. Objections to tubular magazine under the barrel - Advantage, 331. Tubular magazine in butt - Fixed box magazines - The Mannlicher magazine, General principles of the cal..30 magazine, 333. Description of the magazine for the cal..30, 334. Revolvers - Classification - Conditions to be fulfilled by a good service revolver - Remarks]
• Ammunition; 8 pages, 10 illus. Price 1.00 {Item No.20552} [Includes: 335. History - Advantages and disadvantages of metallic cartridge cases - Folded head cartridge, 336. Folded head cup anvil cartridge - Solid head cartridge, 337. Components of the cartridge - The bullet - The powder, 338. Components of the cartridge - The case - The primer]

Chapter X. Machine and Rapid Fire Guns

• Machine Guns; 30 pages, 32 illus. Price 3.00 {Item No.20553} [Includes: 339. Definition - Object - Advantages - Disadvantages - Requirements - Kinds of machine guns, 340. The Gatling gun - Parts- Barrels - Cylinders - Casing, 341. The Galting gun - Parts - The bolts - The cam groove - Action of mechanism, 342. The Gatling gun - Feeds - Tin feed case - Objections - Bruce feed - Objections, 343. The Gatling gun - The Accles feed - Advantages and objections, 344. The Gatling gun - Latest improved feed, 345. The Gardner gun - Parts - The barrels - The casing - The bolts, 346. The Gardner Gun - The firing mechanism - Action - The extracting mechanism, 347. The Gardner gun - The cams - The feed valve and guides, 348. The Maxim automatic machine gun - General principles - Action of mechanism - Advantage - Parts, 349. The Maxim automatic machine gun - The barrel and frame - The breech mechanism, 350. The Maxim automatic machine gun - The breech block and carrier, 351. The Maxim automatic machine gun - The firing mechanism - The feed, 352. The Maxim automatic machine gun - Action of the mechanism, 353. The Hotchkiss revovling cannon - General features - Rotating mechanism - Loading mechanism - Extracting mechanism - Action, 354. The Hotchkiss revolving cannon - The feed - The firing mechanism]
• Rapid Fire Guns; 19 pages, 19 illus. Price 2.00 {Item No.20554} [Includes: 355. Characteristics of rapid fire guns - Object - History, 356. The Hotchkiss rapid fire gun - The gun - The breech mechanism - Action, 357. The Hotchkiss rapid fire gun - Firing mechanism - Action - Remarks, 358. The Nordenfelt rapid fire gun - The breech mechanism - Action, 359. The Nordenfelt rapid fire gun - The firing mechanism - Action - Remarks, 360. The Driggs-Schroeder rapid fire gun - The breech mechanism - Action, 361. The Driggs-Schroeder rapid fire gun - The firing mechanism - Action - Remarks, 362. The Maxim semi automatic rapid fire gun - The breech mechanism - Action, 363. The Maxim semiautomatic rapid fire gun - The firing mechanism - Action - Remarks, 364. Ammunition for rapid fire guns - Projectiles - Cases]

Index; 39 pages Price 4.00 {Item No.20555}

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