Illuminating engineering practice; lectures on illuminating engineering delivered at the University of Pennsylvania, Philadelphia, September 20 to 28, 1916, under the joint auspices of the University and the Illuminating Engineering Society (1917)
University of Pennsylvania, Illuminating Engineering Society · New York, McGraw-Hill Book Company, Inc; [etc., etc.] · leaf 689
by day they did not in any sense suggest the idea oflight sources. High efficiency incandescent electric lamps installedin these two columns gave a combined initial (bare lamp) candle-power of approximately 500,000 and yet the intrinsic brilliancy was COURT OF ABUNDANCE Showing the Organ Tower and… … RYAN: BUILDING EXTERIOR 553 SO low that the fountains were free from disagreeable glare and thegreat colonnades were bathed in a soft radiance. For relief lightingthree incandescent lamps were placed in specially designed cupreflectors located in the central flute to the rear of each column.This…
Lighting
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