Henry and Hora's modern electricity; a practical working encyclopedia (1915)
Henry, James. [from old catalog], Hora, Karel Jan, 1881- [from old catalog] joint author · Chicago, Laird & Lee, inc. · leaf 200
eallyserviceable electric motor car could be constructed. Butsince then, numerous successful systems of electric tractionhave been devised. The electric service therefore has nearlyreplaced all others in street cars. The plate opposite showsthe electrically important parts of an electric motor car,… … 198 MODERN ELECTRICITY and this pressure may therefore be carried in bare overheadwires. If the system is very extensive, as in large cities, highpressure alternating currents are generally employed, whichare then, at sub-stations, converted by means of rotary con-verters to direct current.
Electrical engineering
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