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The popular encyclopedia; or, 'Conversations Lexicon': [ed. by A. Whitelaw from the Encyclopedia Americana]. (1877)
by Popular encyclopedia
A little later, but no doubt quite independently, Elisha Gray of Chicago, and Graham Bell of Canada, made a similar application of Helmholtz's principle. In the Centennial Exhibition of Philadelphia, Elisha Gray successfully showed in the presence of the Emperor of Brazil the transmission of four messages simultaneously through one wire by long and short sounds (for the 'dot' and 'dash' of the Morse alphabet) produced by the vibrations of four tuning-forks of different periods at the ...
An Encyclopedia by Quentin R. Skrabec Jr.
Alexander Graham Bell and Edison were both working on the multiple telegraph with financial backing. The hope was that the multiple telegraph could break the monopoly held by Western Union Telegraph Company. Bell demonstrated the ability to “talk” with electricity in 1874, which shifted the research effort from the telegraph to the telephone. This development allowed him to have two investors, Gardiner Hubbard and Thomas Sanders, to finance the initial development work.
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Alenxander Graham Bell's birthplace
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