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 89
m mois- 73 64 POWER TRANSMISSION ture during rainstorms. The principal materials used are glassand porcelain. Porcelain has the advantage over glass in that it is less brittleand generally stronger and is less hygroscopic, that is, moisturedoes not so readily collect on and adhere to its surface.…
Electrical engineering
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