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Geo.M.Hopkins

Wiring Diagram Telephone 1881

Wiring Diagram Telephone 1881

Scientific American March 19, 1881

Telephone 1881

Telephone 1881

Scientific American woodcut March 19, 1881

TELEPHONE TRANSMITTER 1881

Telephone 1881Telephone 1881NEW TELEPHONE TRANSMITTER.
BY GEO. M. HOPKINS.
The microphone, with pendants, figured and described by the writer in the SCIENTIFIC AMERICAN of Nov. 16, 1878, was among the earliest of telephone transmitters, and although the device was crude in appearance and exceedingly simple in its construction, it contained the germ of a successful instrument, and was favorably noticed in the scientific papers of Europe.

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