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Scientific American, Vol. 16, No. 24 (1867) (1867)

leaf 7

An illustration from Scientific American, Vol. 16, No. 24 (1867), 1867, leaf 7
t on the other end of D will close them. The lever, E, may be SP > What is the Matter. very rapidly, a multiplying wheel is connected with the plate made adjustable, to fit thicknesses of work which vary greatly, Notwithstanding the great number of patents issued week- se that one turn of the crank… … sanitary protection are not applied, the pes- two feet in diameter will yield is almost in- THE HOLTZ ELECTRICAL MACHINE. credible to one who has not witnessed it. It tilence may yet make deadly ravages. The watchword of the Metropolitan Board of Health, “timely, should be. The Commissioner has…

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