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Scientific American, Vol. 40, No. 17 (April 1879) (1879)

leaf 5

An illustration from Scientific American, Vol. 40, No. 17 (April 1879), 1879, leaf 5
o greatly increased as to consti- telephone being flxed in front of, and concentric with it. If Mr. Edison has recently improved his carbon telephone so the transmitter and call bell apparetns were removed, the tute what in a speaker would be considered an unusually much that in conjunction with a… … tact with the mixture, which is kept in a moistened condi- year. According to a statement of the Commissioner of tion. Upon the upper circumference of the cylinder, which Agriculture, the number of hogs in the country at the be- is caused to revolve on a horizontal spindle, a metallic strip Fig.…

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