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 160
clusively to the production ofsubmarine cable. Submarine cables.—Considerable progress has beenmade in the production of submarine cable, althoughof late years the chief changes have been in the direc-tion of increasing the weight. At the present time such cable, as shown in illustra-tion on page… … Shore-end Cable.
Telephone · Telegraph · Fire alarms
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