Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 178
ing thelamp. This is one of the things that willalways be more or less mysterious to thelayman and that assists in deception andmisleading information. Even those whoknow the subject fully, find it verydifficult to judge properly between themerits of different light distributionsin the various…
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
