A Course of Instruction in Ordnance and Gunnery: Compiled for the Use of the Cadets of the United States Military Academy

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Van Nostrand, 1862 - Artillery - 550 pages
 

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Page 111 - Prepare the ground for the base of the pile by raising it above the surrounding ground so as to throw off the water ; level it, ram it well, and cover it with a layer of screened sand.
Page 124 - The dispart is the difference of the semi-diameters of the base-ring and the swell of the muzzle, or the muzzle band. It is therefore the tangent of the natural angle of sight, to a radius equal to the distance from the rear of the base-ring to the highest point of the swell of the muzzle, the sight, or the front of the muzzle band, as the case may be.
Page 36 - Diameter of holes for mammoth-powder . .No. 7, 0.75 in.; No. 8, 0.9 in. Hexagonal, ) Dimensions of these powders vary with the caliber of the Cubical, > gun in which they are used, and have not as yet been Prismatic. ) definitely determined upon in our service. GRAVIMETRIC DENSITY Is the weight of a given measured quantity. It is usually expressed by the weight of a cubic foot in ounces.
Page 160 - Puddled Steel. If, in the operation of puddling, the process be stopped at a particular time determined by indications given by the metal to an experienced eye, an iron is obtained of greater hardness and strength than ordinary iron, to which the name of semi-steel, or puddled steel, has been applied.
Page 156 - Manual, bronze used for ordnance consists of 90 parts of copper and 10 of tin, allowing a variation of one part of tin, more or less. It is more fusible than copper, much less so than tin, more sonorous, harder, and less susceptible of oxidation, and much less ductile, than either of its components.
Page 167 - The color and texture of cast iron depend greatly on the size of the casting and the rapidity of cooling ; a small casting, which cools quickly, is almost always white, and the surface of large castings partakes more of the qualities of white metal than the interior.
Page 43 - Barrels of powder should not be rolled for transportation : they should be carried in hand-barrows, or slings made of rope or leather. In moving powder in the magazine, a cloth or carpet should be spread ; all implements used there should be of wood or copper, and the barrels should never be repaired in the magazine. When it is necessary to roll the powder for its better preservation and to prevent its caking, this should be done, with a small quantity at a time, on boards, in the magazine-yard.
Page 42 - It should not be opened in damp weather if it can be avoided. The ventilators must be kept free; no shrubbery or trees should be allowed to grow so near as to protect the building from the sun. The magazine yard should be paved and well drained.
Page 28 - ... obtained. The weight added to the sulphur is of course deducted. INSPECTION REPORT. The report of inspection should show the place and date of fabrication and of proof, the kind of powder and its general qualities, as the number of grains in 100 grains, its specific gravity; whether hard or soft, round or angular, of uniform or irregular size; whether free from dust or not; the initial velocities and pressures per square inch obtained in each fire; the amount of moisture absorbed; and, finally,...

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