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
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. … The various types of inclosing shades contrasted.1. Welsbach reflex in ground glass; 3. Dense opal globe:3. Common prismatic glass shade; 4. Reflex lamp opalshade; 5. Same type glass as one over tungsten lamp:6. Undesirable ground glass shade. See poffe 53
Lighting
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
