Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 262
day. As much light as possible, preferablyfrom above, should be admitted at thetarget end. out of doors so far as diffusion of lightis concerned, and it should be quitepracticable. Mr. H. Brazil has kindly carried outa suggestion of mine at a private rangebelonging to the electric lighting… … Fig. 5.—Special arrangement of a series of illuminated white screens havinjapertures through which the target is viewed.
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
