Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 540
forevery-day practical purposes—for an-nouncements and notices of all kinds—has made great strides, and considerableingenuity has been shown in theirdesign. from behind. In this way more evendistribution of hght and more artisticresults are secured ; and it is naturallymore economical in energy to… … Fh.:. 1. ShowiDg mfctliod of ccnstructing LetttrSign of spherical beads of various sizes. Most of us can remember the timewhen the electric sign invariably tookthe form of words outlined in bareincandescent lamps. For a long timethis was the only method. More re-cently such signs have l)een…
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
