American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 361
3o8 AMERICAN TELEGRAPHY, … closely, and necessarily so, on account of the high rate of transmission of signals onthis system. When the circuits are cut through, as in the figure, the circuit of either sidemay be traced, for instance, from the earth at e, through mb to the armatm-e a of WHEATSTONE AUTOMATIC TELEGRAPH. 309 pk;…
Telegraph
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