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 389
erurban work the ballast is brought up nearly to the top of theties. This insures a quiet track, that is, there is much less vibra-tion than if the track were insufficiently ballasted. SPECIAL WORK The special pieces of track construction necessary in citiesform a most important feature as they…
Electrical engineering
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