Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 406
, which is along shaft with cutters atone end. The gun re-mains steady, while thebar enters into the gunat the muzzle, and turnsat the same time, thuscutting what are calledspiral grooves through-out the length of thebore of the gun. Thisrifling is done so as togive the shot or shell,when the gun… … PUTTING THE JACKET ON THE TUBE OF A BIG GUN. than the steel of the gun, enters into the grooves,is turned by them, and gives the projectile aspinning motion during its flight. 922 THE GUN-FOUNDRY AT WASHINGTON. [Sept.
Children's literature
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