A dictionary of electrical words, terms and phrases (1896)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W.J. Johnston company · leaf 236
than when they are open. The opening of the aperture between the slidesL, L, may be automatically accomplished by theaction of the light itself, by moving them by anelectro-magnet placed m the circuit of a local bat-tery, and a selenium resistance may be so arrangedthat when light falls on it the… … Selenium Eye. traction of the pupil of the eye from the action oflight on the iris. (See Photometer, Selenium.) Fac-Simile Telegraphy, or Panteleg-raphy.—(See Telegraphy, Fac-Simile) Fahrenheits Thermometer Scale.—(SeeScale, Thermometer, Fahrenheits?) Fall of Potential.—(See Potential, Fallof.)…
Electricity · Electrical engineering
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