Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 24
value 498-3 B.Th.U. (e) 6-Light Swanley. Gas consumption : 15 cu. ft.„ pressure : 25/lOths. „ value : 510 B.Th.U POLAR CURVES OF LIGHT DISTRIBUTION OF FITTINGS(SUGGS) ILLUSTRATED ON OPPOSITE PAGE. THE [LLUMINATING ENGINEER (Jan. 1922) 13
Lighting
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