American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 365
the repeaters, in repeating oflices, as it is only necessaryto bring the external, main and local batteries and line wires and ground wires, tothe marked binding posts, when the repeater is, virtually, ready for service. In Fig. 234, beginning at the binding jjosts i and 2, on the left hand side. A…
Telegraph
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