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Digital Collections

Illustrations, Publications

Figure 160. Telegraph Instruments

  • 1917

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Public Domain

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Diagram depicting the different components of a telegraph, including the key, sounder, and relay.

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  • 22 cm H
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Subject
Rights Public Domain Mark 1.0
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  • Courtesy of Science History Institute

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  • Page 194, Shelfmark TK145 .C76 1917

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Cite as

Croft, Terrell. “Figure 160. Telegraph Instruments.” Practical Electricity. New York, New York: McGraw-Hill Book Company, 1917. TK145 .C76 1917. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/ubxmkfa.

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