The mariners' handbook; a convenient reference book for navigators, yachtsmen, and seamen of all classes (1906)
International Correspondence Schools, Roden, Ernest Konrad, 1866-, International Correspondence Schools. Pocketbook · Scranton, Pa. : International Textbook Co. · leaf 232
NAVAL ORDNANCE 199 … holds it up rigidly against the force of the powder gases when the gun is fired. Several modifications of the above general principle are in use, having-for their object increased rapidity of action. Thus, the Elswick breech plug, Fig. 2, is conical, this shape giving the. advantage that the plug…
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