Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 122
• — w 9 t9-er 1 Fio. 5. A 1 7-9 I V w A V I 7-9 1 Fro. 6. t I1 w w A w w w w w w w A 1 A w w 1 I 1 r Fio. 7.Diagrams showing positions of fittings in the various installations. THE ILLUMINATING ENGINEER (april 1922) 111 The difference in illumination pro-duced by the absence or presence ofblinds is… … (A) 14Opal Bowl, also with daylight bowl C)l4 THICK OPAL BOWL.
Lighting
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