Modern practice of the electric telegraph. A handbook for electricians and operators (1872)
Pope, Frank L. (Franklin Leonard), 1840-1895 · New York : D. Van Nostrand · leaf 7
GENERAL OFFICE OF THE WESTERN UNION TELEGRAPH COMPANY, CORNERBROADWAY AND LIBERTY STREET, NEW YORK. ^MODERN PRACTICE or THE ELECTRIC TELEGRAPH. .X A HANDBOOK TOB ELECTRICIANS AND OPERATORS. BY FRANK L. POPE. SIXTH EDITION. REVISED AND ENLARGED. D. VAN NOSTRAND, Publisher, 23 MTTBBAY STBEET & 27…
Telegraph
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