Page:Incandescent electric lighting- A practical description of the Edison system.djvu/102

 the electrical part of the plant. Here are located in the front part of the building, directly over the engine-room, twenty-four dynamos, each with a capacity of 750 ampères and 140 volts. Each dynamo weighs about eight tons. Overhead travelling cranes are installed here and in the engine-room for ready and quick handling of all apparatus. Through the centre of the dynamo-room is located the electrical gallery. From here are con- trolled the workings of all the dynamos and other apparatus, also all outside lines. Everything in connection with handling, generation, and furnishing of current is directly under the eye of one man in this gallery, and from which he has a general view of the dynamo-room floor and the workings of the dynamo, a second man being on the floor to see to the bearings and brushes. From this gallery run all the feeders, which connect into the network of mains, covering over an area of about one and one-half miles square. The ampère meters are located on each feeder, so as to show the load in