Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 58
Fig. S.—Showins; new method of li^Viting passages at Piccadilly Circus Station (Piccadilly andBrompton Railway). The lamps are concealed in whitened slots in the root. of illumination during recent years. Mr. Dow next showed a diagram A comparison of the illumination of (Fig. 5) illustrating the… … Fig. 6.—EarlV fourt .-^laiiuu : iP of E-Tungsten lamps. Average illuminatiuu oversquare foot. Cousuinptiou UO watts per
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
