Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 173
e outsidecounters of the shop. It v,i\\ be noticedthat there are also two low-pressureiii\ crtcd lamps over the outside counter,t(i the left of the picture. ObservationsoE the illumination showed on the hori-zontal surfaces of the counter on thisside 24 foot-candles ; «hile that onthe other side,… … ot Store of Messiv. Fi-eeman, Hariiy, .ind Willis, Harringny. vertical surface of the shelves on thewalls 8 to 12 foot-candles were found ;whilst on the floor the observationsshowed 9-3 to 10 foot-candles. Themarble waMn on the left side of thepicture showed a surface brightness of93 to 10…
Lighting
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