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 45
also made in seve-ral other forms, and various devices for increasing thesound of the lever arc made use of. On many linesthey are found to answer as well as the usual arrange-ment, employing a relay and local battery. * The instrument shown in the figure is from the manufactorj of C. T. & J.… … 58. ARRANGEMENT OF A TERMINAL STATION.—Fig. 17is a diagram showing the arrangement of wires, batteries,
Telegraph
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