International Conference of European Telephone and Telegraph Administrations Held at the Sorbonne, Paris, Sept. 4th to 11th, 1910: Telephone Service in America.
New York: Smith, Jones & Leigh, 1910. Speech given by the chief engineer of American Telephone & Telegraph Company, John J. Carty, who invented the metallic circuit, which allowed for long distance calls, designed and installed the first multiple switchboard, and developed the bridging bell and common battery systems. Here, he discusses the topic of automatic versus manual switchboard systems. 8vo, 23pp. Stapled paper wrappers, library stamp upper right corner front wrapper. 7 1/2 x 101/2" Very good overall. Item #19456
Price: $45.00
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