Lessons in practical electricity; principles, experiments, and arithmetical problems; over four hundred illustrations; an elementary text book (1909)
Swoope, C. Walton (Coates Walton), d. 1901 · New York, D. Van Nostrand company · leaf 435
temperatureat which carbon boils, like that of other substances undeiconstant 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 wrell as the current, the crater area is… … ELECTRIC LIGHTING. 417 peculiar characteristics depending upon the length of the gapbetween the ends of the carbons. When this distance is toosmall the arc will emit a peculiar hissing noise, and is thencalled a hissing arc. The noise is probably due to the too rapidvolatilization of the carbon. An…
Electricity · Magnetism
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