American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 240
current. Since, however, the neutral relay nr, is in the same circuit, and subject to thesame influences as the polarized relay pe, it is clear that whatever changes of mao-net-ism take place in the polarized relay must also occur in the neutral relay. In otlierwords, every reversal of the battery…
Telegraph
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