Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 228
Fig. 1.).—Newspajjer Office Referciico Library Illimiinated by Glow I.nn … Fig. 13,—Three-Colour Presses Illuminated by Glow Lamps. 256 THE Illuminating engineer. illumination when the men \\erc inplace that they had at other times.The delivery counter, 3ft. Gin. high,was remarkably evenly lit with about2-2 foot-candles. I have mentioned a good manyfigures, given some…
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
