Diagram depicting various components of the galvanic telegraph system designed by German physicist, inventor, and engineer Carl August von Steinheil (1801-1870).
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|Rights||Public Domain Mark 1.0|
Turnbull, Laurence. “Steinhael's [Steinheil's] Galvanic Telegraph.” The Electro Magnetic Telegraph: with an Historical Account of Its Rise, Progress, and Present Condition . Philadelphia, Pennsylvania, 1853. https://digital.sciencehistory.org/works/ety8m28.
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