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 411
,opal enclosing globes are used;but in other installations areflector, designed to give thebest distribution of light forstreet illumination, is utilized.Fig. 78 shows a radial wavereflector and Fig. 79 illustratesthe effect of this, and one other type of reflector, upon the distribu-tion of light.…
Electrical engineering
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