Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 181
imity of other wirescarrying varying currents. Telegraphic signals can be plainlyheard in a telephone instrument on a line running parallel with aneighboring telegraph line for a very short distance. The estab-lishment of an electric railway or electric lighting plant in a townusing grounded… … FIG. 139.—&KOUNDED LINE. Disturbances on telephone lines from neighboring wires may beattributed to one or all of the following three causes: leakage, elec-tromagnetic induction, and electrostatic induction. Leakage may occur through defective insulation between thetwo circuits; or even when…
Telephone
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