Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 633
is-tinction. The first illustrations show the incon-venience that may be caused by theshadows from head or hand owing tobadly placed lights—a matter that isappreciated by lighting experts but stillnot sufficiently recognised by non-techni- ^^^ ^ <s\ ■ a \ a \ a *■ ^„^„ -h 1 1 i.y ^ T- 1 ^^^-… … THE ILLUIkllNATIXG ENGINEER 619 T-square, indiarubber, ruler, &c., areslightly tilted to show the shadows at theiredges which, although not immediatelyperceptible to a casual observer, wouldnaturally cause trouble immediately oneattempts to draw. This justifies the Fig. 2. These show the effect…
Lighting
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