Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1902)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 435
he temperatureat which carbon boils, like that of other substances underconstant pressure, is practically constant. A crater one inchin area emits, approximately, as much light as 100,000candles, but since its area depends on the quality of thecarbon used, as well as the current, the crater area is… … Fig. 379.—The Electric Arc. The white area in the positive car-bon represents the crater; thearrows indicate the directionof the maximum zoneof illumination. ELECTRIC LIGHTIXG. . 417 peculiar characteristics depending upon the length of the gapbetween the ends of the carbons. When this distance is…
Electricity · Magnetism
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