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Scientific American, Vol. 7, No. 37 (1852) (1852)

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An illustration from Scientific American, Vol. 7, No. 37 (1852), 1852, leaf 0
place upon drills about three inches apart, with a sharp the wheel frame by a spring catch, P, which receives motion by a train of gear from be- the curves; but the greatest evil is the want ridge between, over which bend the cutting, acts as jaws to embrace the lever. The arm, hind; I is a… … be in doubt as to the cause of many of the ac- tain, available for the national defence in the Q, is for the purpose of relieving the lever, M, per end of this wire has a thread turned onit, cidents which occur and it passes through a cross bar over the from the spring catch, when the wheel, I, is…

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