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Scientific American, Vol. 18, No. 9 (February 1868) (1868)

leaf 4

An illustration from Scientific American, Vol. 18, No. 9 (February 1868), 1868, leaf 4
ceived upon the subject is of aroundD,—which could not possibly be the result did B make wheel around the stationary one, keeping the bottom of the itself a curiosity. They come from esteemed correspondents but one revolution. H. Anderson. axle in the same relative position to the stationary wheel,… … quarter of 8 revolution. These two together give the wheel the fixed wheel (keeping the point, A, at all times in contact) [If our correspondent will attach the thread to any conve- the appearance of having made one half revolution on arriv revolves once on its own axis, it would revolve twice on…

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