Browsing named entities in a specific section of Harper's Encyclopedia of United States History (ed. Benson Lossing). Search the whole document.
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Telephone, the Chronology of: Robert Hook conveyed sounds to a distance by distended wire......1667 Alexander Graham Bell begins his investigation of electrical transmission and reproduction of articulate speech......July, 1874 Bell constructs an electrical telephone, with a diaphragm of gold-beater's skin, which transmits speech......July, 1875 Thomas A. Edison, furnished by William Orton, president of the Western Union Telegraph Company, with a description of Reis's telephone, begins experiments with a view to producing an articulating telephone......July, 1875 Elisha Gray files his caveat for an invention to transmit the tones of the human voice through a telegraphic circuit, etc......Feb. 14, 1876 Professor Bell publicly explains his method before the American Academy of Arts and Sciences of Boston......May 10, 1876 Bell's telephone exhibited at the Centennial Exhibition at Philadelphia, Pa.......June, 1876 Iron diaphragm first used by Bell......June