Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 70
Fig. 1.—Diffusion—Similar lamps equipped with similar types of reflectors. Thaton right polished surface, that on left dcpolished surface. Note softening ofshadows from depolished surface. … Fig. 2.- Illumination of a modern drawing oflice with scmi-indircct units and half-w.iltlamps, with a view to avoidinij inconvenient shadows. .V;. //. C. Wheat.C 60 THE ILLUMINATING ENGINEER (fee. 1916) covering several years, and which, havingthe requisite diffusion, were entirelysufficient for…
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
