Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 228
sumption in watts 1925 Efficiency watts per ft candle per sq. ft .3 usual colour distinction, whicli, forordinary single-colour printing, is nodisadvantage, and may be an advan-tage, as the makers claim thatslight variations of colour and quaUtyin ink are more easily observed withmonochromatic than… … Fig. 1.).—Newspajjer Office Referciico Library Illimiinated by Glow I.nn
Lighting
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