International Library of Technology · Scranton, International Textbook Co. · leaf 221
d in a vertical plane with afilament in the positionshown. It will be no-ticed that, viewed fromposition 1, the candle-power is practically zero,because the light isalmost completely cutoff by the base of thelamp. At points 2 andJf it is a maximum, be-cause viewed from thesepoints the maximumamount… … 24 ELECTRIC LIGHTING. § 16 in a horizontal plane, and the curve of vertical distributionshows how the lamp behaves as to throwing the light up ordown. In speaking of the candlepower of an incandescentlamp, the mean horizontal candlepower is usually meant,and this is most readily obtained by…
Electrical engineering
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