American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 157
Wheatstone bridge has also been used in overland duplex telegraphyand is almost exclusively employed in submarine duplex telegraphy. The operation of the Wheatstone bridge is, it may be said, based primarilyon the fact that, when the potentials at two points of a wire are equal, no flow… … diagram similar to Fig. 102, the potential at any point of a circuit in which a currentis flowing, (and of which the e. m. f. and resistance are known,) may be found, in themanner described in Chap. VI., and of which one or two additional illustrations maybe given. It is assumed that the conductor…
Telegraph
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