Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 431
atisfactory light must be of a proper quality. It should havea continuous spectrum, that is, one containing every color, in orderthat the relative color values of objects illuminated may be the same aswhen seen by daylight. NOTE.—A desk lamp should be placed to one side rather than directly in…
Electrical engineering
Internet Archive · Brigham Young University · Public Domain Mark 1.0. Free to use for anything.
