Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 437
of the light sources isviewed through the eyepiece of the instrument and, during the otherpart of the revolution, a surface viewed by the second light source isobserved. The flicker occasioned by this change disappears whenthe screen is brought to a point where it is equally illuminated by thetwo… … s &; I 1x1 a> Q «31 O MHO W oo HO 0? ISOLATED LIGHTING PLANTS IN FARMING AND SCATTERED SUBURBAN DISTRICTS With all its superlative merits, electric illumination has alwayspossessed one supreme shortcoming—that of being available only inlocalities where consumers are numerous and closely…
Electrical engineering
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