Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 370
by thetrains. Signals for steam railways have been brought to a high stateof perfection. They are very expensive and the cost of a system suchas is used on a steam railway would be prohibitive for electric rail-ways in most parts of the country. At the same time simple block 324 ELECTRIC RAILWAYS…
Electrical engineering
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