Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 644
Photo, taken by drnjUght. Fig. 14,—A view of the office of the Allan Line (Cockspar St., London, S.W.), bydaylight. The pillars stand out liqht against a dark background, and the interiorof the arch is lighl(r than its surroundings. THE ILLUMINATING ENGINEER 629 … Photo, /liken entirely by nrtificinl light. Fig. 15.—The same view by artificial light. Note the reversal of shadow. Thepillars nowappear firtr/; against a lifj^ht background, the inside of the arch isnow darker than its front face instead of lighter; and even the grooves in thepillars appear as…
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
