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Scientific American, Vol. 46, No. 8 (February 1882) (1882)

leaf 4

An illustration from Scientific American, Vol. 46, No. 8 (February 1882), 1882, leaf 4
line with the dead center knife edge, the the satellites of Mars, he had occasion to need an extremely small figure, which is free to turn on the spindle, yet will motion at this point is virtually nothing. It is at the same small hole. A hole about the twenty five-hundredth part of turn with it… … FIFTY-TON TESTING MACHINES, DESIGNED BY THOS. WILLIAMSON. © 1882 SCIENTIFIC AMERICAN, INC

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