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Scientific American, Vol. 42, No. 25 (June 1880) (1880)

leaf 7

An illustration from Scientific American, Vol. 42, No. 25 (June 1880), 1880, leaf 7
a perforated muSic sheet that is a spindle to the drill chuck, and attaching the copper disk or tightened clamps the door tightly down to its place, tlie arm Fed by a crank. wheel to the spindle by means of an ordinary machine screw being capable of being swung into the plane of the doo Mr. Samuel… … able and the other rigid, opposite bends veled, and some of them may be straight of the wire being carried under the Fig. l.-GLASS ENGRAVING, LINING. across or cylindrical. Pieces of copper rim of the button. tube of different sizes and thicknesses Bertha Schleifer, of New York city, are also very…

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