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
mference. With this arrangement, the threads cover a much larger proportion of the surface of the block than with other systems, and therefore, for a given strength a shorter and lighter block can be used. In the small calibers, moreover the use of a short block makes it possible to swing the block… … 200 .V.4I.4L ORDXANCE allowed to fall by its own weight for opening, and theDriggs-Schroeder in w^hich a block is pivoted in rear of thebreech and turned up and down for closing and opening,the last motion of closing bringing into play a beveledsurface that forces the cartridge home. Breech…
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