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Scientific American, Vol. 61, No. 14 (1889) (1889)

leaf 3

An illustration from Scientific American, Vol. 61, No. 14 (1889), 1889, leaf 3
t it can be or automatically. In the cut the automatic system is sifter is closed and the crank turned, a rotary motion conveniently carried in the pocket, and designed to af- shown. A centrifugal governor acts upon a long screw will be given to the sieve. The ashes are brought to ford ready means… … present issue an improvement in frictional gearing that BIDWELL’S POCKET HAND EXERCISER. JORRES’ SHUTTER OPERATING DEVICE. may be properly termed such an innovation. It is the [FOR DESCRIPTION SEE PAGE 213.] Evans frictional gearing. The simplest application of the hand and wrist, to attain…

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