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Scientific American, Vol. 84, No. 24 (1901) (1901)
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stant. All differences of speed are corrected travel along the rotating cylinder by a carriage, very as the cylinder rotates, glides over a surface partially at the end of each revolution. An accumulation of er- metallic, partially insulated. When in contact with much as the reproducing stylus of a… … © 1901 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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