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Scientific American, Vol. 29, No. 7 (1873) (1873)
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ack. On the cones being reversed, they This clarifier can be used at any stage of the process, either loose on the shaft by means of a toothed clutch, for driving act asa brake, and arrest: the motion of the jib. A pinien an oblique worm shaft gearing into a tangent wheel on the before or after… … © 1873 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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