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arms Armstrong guns artillery attached axis axle-tree ball barrel batteries blade bore bottom breech bullet burning bursting calibre canister shot cannon carriage cartridge case-shot cast cast-iron cavity centre of gravity charcoal charge of powder columbiads combustion composition cylinder density diameter diminished direction distance effect elevation employed equal experiments exterior feet fire-arms force fuze fuze-hole grains greater grooves ground gunpowder handspike heat hole horizontal howitzers inch increased initial velocity iron jectile length light line of sight loading mealed powder metal military mortars motion mould musket muzzle nitre object Ordnance penetration piece placed plane plate portion potassa pressure prevent projectile proportional range rear resistance ricochet fire rifle rifle-gun rifle-musket rocket Rodman guns rotation sabot saltpetre screw sea-coast shell siege small-arms solid shot steel sulphur surface thickness timber tion tlie trajectory trunnions tube vent vertical weight wheels windage wood wrought-iron yards
Página 555 - The lead is also allowed to percolate among the segments, so as to fill up the interstices, the central cavity being kept open by the insertion of a steel core. In this state the projectile is so compact that it...
Página 138 - 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.
Página 93 - 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.
Página 147 - ... it can be easily drilled and turned in the lathe, and does not resist the file. It has a brilliant fracture, of a gray, or sometimes a bluish-gray color ; the color is lighter as the grain becomes closer, and its hardness increases at the same time.
Página 334 - To CLEAN THE LOCK. — Wipe every part with a moist rag, and then a dry one ; if any part of the interior shows rust, put a drop of oil on the point or end of a piece of soft wood dipped into flour of emery ; rub out the rust and wipe the surface dry; then rub every part with a slightly oiled rag;.
Página 334 - Do not put oil into the vent, as it will clog the passage and cause the first cap to miss fire ; but, with a slightly oiled rag on the wiper, rub the bore of the barrel and the face of the breech-screw, and immediately insert the tompion into the muzzle.