Duff, A. Wilmer (Alexander Wilmer), b. 1864, ed, Guthe, Karl Eugen, 1866-1915, Hallock, William, 1857-1913, Lewis, E. Percival (Exum Percival), 1863-1925, Goodspeed, Arthur W. (Arthur Willis), b. 1860, Carman, Albert Pruden, b. 1861, McClung, Robert Kenning, 1874- · Philadelphia, P. Blakiston's Son & Co · leaf 451
2° to 2928 at 1646°, with a mean valueof 2879. The total energy emitted by an incandescent source is propor-tional to the area included between the energy curve and the axisof X. That part of the energy which produces luminosity is in-cluded between the limits of the visible spectrum. The… … 434 LIGHT. red hot carbon. The lumin-ous energy is represented bythe shaded part of the areabetween the curve and theA-axis. Evidently the lumin-ous efficiency rises very rap-idly with the temperature, sothat a small increase in thecurrent through an incandes-FiG. 317. cent lamp will greatly in-…
Physics
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