The lighting book; a manual for the layman, setting forth the practical and esthetic sides of good lighting for the home (1913)
Godinez, F. Laurent · New York, McBride, Nast & company · leaf 56
working areas. Since ourvisual impressions are invariably acquired fromsurface indications, it is evident that the effects andinfluence of artificial light are very largely de-pendent on its shade or covering. Therefore thesource of light should invariably be concealed inappropriate glassware,… … Comparison booths showing the action of shades which do not entirely inclose lamps. 1 and 3. Ordinary white opal glass; 3. Glass which transmits and reflects; 4 and 6. Sheffield design; 5. Dense opal of proper shape.
Lighting
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