Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 93
of service to summarise briefly some of this earlier work.Attempts had been made to use both theselenium cell, the electrical resistance ofwhich diminished under the action oflight, and the ])hoto-electric cell de\Ttsedby Elster and Geitel. The essentialarrangements for using such cells are shownin… … Fig. 2.—Showing the variation in relativesensitiveness throughout the spectrum of aselenium cell at different Illuminations.(E-=l toE = 16.) * Physical Photometry, by H. E. Ives (paperread before the Illuminating Engineerint; Society,U.S.A., November 7th, 1914); The Establish-ment of Photometry on…
Lighting
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