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Scientific American, Vol. 18, No. 12 (1868) (1868)

leaf 4

An illustration from Scientific American, Vol. 18, No. 12 (1868), 1868, leaf 4
he correct answer “turn on its own axis twice,” printing twice, in going once to the question at issue. The pointer makes two revolutions, but not for the reason round a cylinder ot the same size. Any body can try it, by The foregoing paragraphs, marked A to E, are submitted taking the instrument… … If it prints twice in going Messrs. Eprtors:—The “ wheel” question seems such a | practical effect of L. M.’s reasoning, he makes out that, in a case very plain one, thatit frets me to see sensible mer differ upon | where a given point can be reached by four routes,—for exam- If you will allow me…

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