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Scientific American, Vol. 42, No. 11 (1880) (1880)
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p limits the pressure; Fig. 5 isan enlarged view of the upper portion of the eu- it may be applied to all machines usually driven by a treadle this valve is in no sense a safety valve, for even if it were gine, showing the oscillating cylinder, the generator, and the or hand. power. * The inventor… … © 1880 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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