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Harper's Encyclopedia of United States History (ed. Benson Lossing) 1 1 Browse Search
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Harper's Encyclopedia of United States History (ed. Benson Lossing), Telephone, the (search)
tute, Salem, Mass., his telephone, using a powerful horseshoe magnet, by which a short speech, shouted into a similar telephone in Boston, 16 miles distant, is distinctly audible to an audience of 600 persons in Salem......Feb. 12, 1877 First-known telephone line connects the office of Charles Williams, electrician, in Boston, and his house in Somerville......April, 1877 First telephone exchange established in Boston, Mass......1877 One form of microphone invented by Edison......April 1, 1877 Experiments begun in Brown University by Prof. Eli W. Blake, Prof. John Pierce, and others, result in the construction by Dr. William F. Channing of the first portable telephone......April, 1877 Handle telephone, now generally in use, made by Dr. Channing and Edson S. Jones, at Providence, R. I......May, 1877 Glass-plate telephone invented by Henry W. Vaughan, State assayer, Providence, R. I.......June, 1877 Bell telephone patent expires......March 7, 1893 Statistics Mi