Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 237
lasses accord-ing to their importance, and a certainminimum illumination from 001 up to0*06 foot-candles specified according toclass, affords a good basis for inquiry.Let us. therefore, have each districtsurveyed and the class of the chiefthoroughfare settled. Next, let usascertain whether the… … Fig. 4.—Night view of a suburban street(Tottenham) during the war, showing effect ofblack band round lantern and clear lowerportion. THE ILLUMINATING ENGINEER (august 1919) 227
Lighting
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