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Scientific American, Vol. 31, No. 15 (1874) (1874)
leaf 3
s 8t tung. In or. diate action.” The committee is advised thatthe board com- slots cut in the keys on one side. Where there is no room der to lift this heavy weight, a massive chain, passing over panies will carry out the above recommendation with great for driving the wedges, such as at the sides… … © 1874 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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