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Scientific American, Vol. 2, No. 40 (1847) (1847)

leaf 3

An illustration from Scientific American, Vol. 2, No. 40 (1847), 1847, leaf 3
316 each other and with the semi-circular bands NEW INVENTIONS. … water per second from each pump with a ve- What they claim asan improvement upon the f Much attention is now being directed to supply the partial vacuum created in pipe A, locity of 40 feet per second and a force of 11.3 magnets is the construction of the electromag- what has been long neglected,…

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