The telegraph instructor by Potter Arthur

Author:Potter, Arthur. [from old catalog]
Language: eng
Format: epub, pdf
Tags: Telegraph
Publisher: Philadelphia, Flemming, Potter & co.
Published: 1870-03-25T05:00:00+00:00

THE ART OF TELEGRAPHING.

15

Figure No. 6 shows the method of connecting the wires between two distant offices. One end of the battery at each office is connected to the ground; in one office zinc to ground, and in the other copper to ground; and the opposite ends are connected to the instruments. The ground connections are generally made by attaching one end of the battery wire to either a gas or water pipe that is laid under ground, in the absence of these, bury a piece of copper in the ground, where it is moist, and attach your wire.

The use of the ground saves one wire, otherwise two wires would be necessary to complete the circuit of the battery, the space between the two ground connections may be considered by beginners the same as the dotted line in fig. 1.

The ends of the batteries passing through the instruments to the

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