Inside Out Library
Light and lighting (1908)
Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 516
G5 t3Q* 165 IBO 165 150 135 Fig. 1.—Mazda Half-watt lamp inweather-proof reflector. … Fig. 1a—Polar curve of 200-watt 110-voltlamp (dotted Hue) and correspondingcurve of lamp in lantern with opalglobe (full Hue).Lighting
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