American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 433
rovided.It has been customary to transmit heliographic signals by flashing the light onthe distant station, which was done by turning the mirror towards and away from thatpoint. Such signals are now, however, generally transmitted, in military or navaloperations, by obscuring the reflection by the… … THE HELIOGRAPH. Military Telegraph Signaling. In this country the Morse system of telegraphy was quite extensively employed asa field telegraph system during the late civil war, and its efliciency was highly com-mended by the Generals in command. MILITARY TELEGRAPH SIGNALING. 363 The telegraph…
Telegraph
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