Telephones and telegraphs: 1902 : [and Municipal electric fire alarm and police patrol systems] (1906)
United States. Bureau of the Census, Steuart, William Mott, 1861-, Martin, Thomas Commerford, 1856-1924, Abbott, Arthur Vaughan, 1854-, Mayer, William · Washington : Govt. Print. Off. · leaf 101
TELEPHONE CENTRAL OFFICES AND CENTRAL OFFICE DISTRICTS IN NEW YORK CITY JANUARY 1, 1894; 21 CENTRAL OFFICES AND 14,528 TELEPHONES … TELEPHONE CENTRAL OFFICES AND CENTRAL OFFICE DISTRICTS IN NEW YORK CITY JANUARY 1, 1905; BO CENTRAL OFFICES AND 180,801 TELEPHONES. OHAPTEE XL HISTORY AND DEVELOPMENT OF TELEPHONY. Early development.—The history of the telephone,like that of the telegraph, as indeed of any other greatinvention, is…
Telephone · Telegraph · Fire alarms
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