A Handbook of Practical Telegraphy


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A Handbook of Practical Telegraphy - Culley, Robert Spelman
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1863 Excerpt: ...reverse direction after each signal, and frequently becomes demagnetized or cross-magnetized by the discharge or return current. The receiving needle moves sluggishly, and the signals run together, so that a letter of three movements-appears like one of a single movement sent slowly. Signals through buried wires are ...

A Handbook of Practical Telegraphy (1863) 2010, Kessinger Publishing

ISBN-13: 9781164736400