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American telephone practice (1905)

Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 185

An illustration from American telephone practice, 1905, leaf 185 — eriments were tried, the results in each case TELEPHONE LINES. 163 pointing conclusively to the induction from voice currents being ofan electrostatic instead of an electromagnetic nature. There is no doubt, however, that induction from wires carryingheavy currents, such as are used in lighting and… … FIG. 143.—METALLIC CIRCUIT LINE. any of the causes is to make the hne a complete metallic circuit.By this is meant a circuit having both its sides formed of a wire,each wire being individual to the circuit and not forming a portionof other circuits. A metallic circuit line connecting two…

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