Light and lighting . Fig. 1.—New Diagram of Simple Circular Polar Curve depressed diametrically 45°. Rectified by 45° Fig. same Polar Curve rectified by20° zones. 244 THE ILLUMINATING ENGINEER (may) flux in candle-lumens. If the polarintensities are scaled in hefners, then2-r Q Q1 will be the total luminous fluxin hefner-lumens. Further, the total fluxin the upper hemisphere will be 2t QHlumens, and the total flux in the lowerhemisphere will be 2rr H Q1 lumens. If weshould desire to know how much flux i-inLrthe same condition in another way, thedistance along G Q1 between any t

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Light and lighting . Fig. 1.—New Diagram of Simple Circular Polar Curve depressed diametrically 45°. Rectified by 45° Fig. same Polar Curve rectified by20° zones. 244 THE ILLUMINATING ENGINEER (may) flux in candle-lumens. If the polarintensities are scaled in hefners, then2-r Q Q1 will be the total luminous fluxin hefner-lumens. Further, the total fluxin the upper hemisphere will be 2t QHlumens, and the total flux in the lowerhemisphere will be 2rr H Q1 lumens. If weshould desire to know how much flux i-inLrthe same condition in another way, thedistance along G Q1 between any twoprojected point- is numerically equal tothe flux in lumens per radian of azimuth,emitted in the corresponding zone on thepolar diagram. Again, B G i- the mean upper hemi-spherical intensity. H Q1 is the meanlower

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