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Scientific American, Vol. 37, No. 14 (1877) (1877)
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e by the voice in speaking, or in shown in the rear. Around one end of any other similar source. Therefore, this magnet is wound a coil, B, of fine first, a wave of air throws the dia- insulated copper wire (silk covered), phragm into vibration; second, each the ends of which are attached to the… … TELEPHONE. APPLICATIONS OF PROFESSOR BELL'S NEW © 1877 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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