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Scientific American, Vol. 33, No. 2 (July 1875) (1875)

leaf 6

An illustration from Scientific American, Vol. 33, No. 2 (July 1875), 1875, leaf 6
Ei(rJ5 … that wear of Fi(f96 B J -Jt mM\ J which the lines, A A, represent thedirection in which the inside face, E,of the jaws would stand to the chuckwhen gripping the work, and B Bthe direction of the same when theoutside face, F,is gripping the work,the effect being, in both cases, tospring or force the…

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