Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 648
object in streetlighting was toproduce shadows, because one could oftensee a shadow more easily than the objectproducing it. This was perfectly true,because the object might be about thesame colour as the road, and would there-fore be difficult to distinguish withoutthe shadow which would be… … Daylight photoorraph showing positious aud character of shadows. Note shadowcompare with those shown in artificial light photograph below. (Min. illumination in shadows nndercases at left-hand side.Max. illaniination in centre of passagewayshown in foreground of photograph. ) 111 (k)ur aud = 11-5
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
