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Scientific American, Vol. 56, No. 3 (1887) (1887)
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. necessarily heavy block and chain when lifting moder- rive, in Royaws. She was born March 16, 1761, and is The London £zgineer, to which we are indebted for ate loads, the crane is furnished with two purchases, therefore 125 years old. The authentic record of ber one for loads up to 30 tons, and… … © 1887 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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