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Scientific American, Vol. 66, No. 19 (May 1892) (1892)
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endurance than can be produced in factory. The rifling adopted for all guns of the United piece of work. any other way. In the guns for our navy highly elas- States service is the "polygroove system," with a twist The original gun foundry board, in recommending tic open hearth steel of the finest… … THE NAVAL GUN FACTOEY, WASHINGTON-ASSEMBLING LAEGE GUNS, © 1892 SCIENTIFIC AMERICAN, INC.Iron · Patents · Rubber · Munn · Oil · Scientific American · Wire · Oil acts · Hot water · Horse power · Carrier pigeons · Gun deck · Soft iron · Cast Iron · Field magnet · Waste rubber
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