Tunzelmann, George William von, 1856- · New York, Scribner & Welford · leaf 254
to themanner in which the current is conveyed to and fromthe car. In the first class the rails are insulated fromthe ground, and the separate rails being placed in electricalcommunication by means of connecting pieces, they areemployed as conductors, one conveying the outflowingand the other the… … 234 ELECTRICITY IN MODERN LIFE. The second class consists of those in which a separateconductor is used for the outflowing current, while thereturn current is carried by both rails. The rails neednot be insulated, but must be in electrical communicationthroughout by means of special connecting…
Electric industries · Electricity
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