Gage, Alfred P. (Alfred Payson), 1836-1903 · Boston, London, Ginn · leaf 609
6.The heated air containing the glowing particles of carbonforms what is called the electric arc. The larger portion of the light, however, emanates fromthe tips of the two carbon terminals, which are heated to anintense whiteness, although some emanates from the arc.The + pole is hotter than the —… … Fig. 476. ELECTBIC LAMPS. 589 i bridge of luminous vapor between the poles. What we see isnot electricity, but luminous matter. . j. The light of the ordinary street arc-lamp has an intensityvarying from one to two thousand candle-power, or the com-bined intensity of from fifty to a hundredordinary…
Physics
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