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Harper's Encyclopedia of United States History (ed. Benson Lossing) 2 0 Browse Search
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Harper's Encyclopedia of United States History (ed. Benson Lossing), Telephone, the (search)
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 Miles of wire, 1,016,777; circuits, 422,620; stations, 632,946; intruments in use under lease, 1,580,101; average daily connections of exchanges, 5,173,803; capital of American Bell Telephone Company, $25,886,300......Report of Jan. 1, 1900 Telephone company in opposition to the American Bell Telephone Company organized ......1901