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Scientific American, Vol. 4b, No. 20 (May 1861) (1861)

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An illustration from Scientific American, Vol. 4b, No. 20 (May 1861), 1861, leaf 0
0 lbs. The windage is one- loading and running into battery was, in one case, The fifteen-inch gun, at Fort Monroe, was cast at 1 minute and 10 seconds ; in another, 1 minute and l-nth inch, and a solid shot would weigh 425 lbs. It the Fort Pitt Foundry of Messrs. Knapp, Rudd & 52 seconds. is not… … RODMAN'S MAMMOTH CANNON. method of Captain T. J. Rodman, of the Ordnance the time of loading—including depressing, sponging, connected with solid castings of large masses), and it Corps, to whose perseverance, zeal and laborious in- is believed a shell of this thickness would present the loading,…

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