American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 345
ANDERSON CHEMICAL AUTOMATIC SY3TEM. or placed to earth; the current of discharge being in the opposite direction to that ofthe current of charge. It will be seen. Fig. 218, that the pen s, paper p and cylinder t, at the transmit-ting station, form a circuit around the battery. This circuit is,…
Telegraph
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