Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 304
orof the lamp is very perfectly exhausted. A. The Edison Lamp.—The Edison lamp (figure 153) is pear-shaped in form. The carbon filament is long and fine, and isbent into the shape of a U. It is made from Japanese bamboo,cut to the requisite size in a gauge. In section it is nearlysquare, being… … B. The Swan Lamp.—The Swan lamp (figure 154) is glob-ular in form, the neck being quite long. The carbon filament ismade from cotton thread, parchmentized before carbonization bytreatment with strong sulphuric acid. The ends of this filamentare very much thickened, and the loop has a double turn at…
Electrical engineering
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