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of the system; c, g, k, and m show the lamps as practically arranged between the wires in the usual manner, while h and i show lamps arranged between the outside wires, as they may be, and frequently are, for certain specific purposes, and e and f illustrates the method of leading
Fig. 12.
wires from the street mains into houses which are to be lighted, as is the practice where this system is to be used on a large scale.
The two generators shown coupled together form the unit which is multiplied in creating a central station. Of course the dynamos vary in size and capacity;
