International Library of Technology · Scranton, International Textbook Co. · leaf 387
to slightly cutdown the intensity as awhole. Curve C shows theeffect of using an outeropalescent globe. It iseasily seen that the effectis to make the light approx-imately uniform in all directions at the expense of greatlycutting it down. The distribution of light from an enclosed-arc lamp is… … fig. 15. 20 ELECTRIC LIGHTING. 18 23. Enclosed-Arc Alternating-Current Lamps.—The direct-current lamp gives a better distribution for street lighting- than the enclosed-a r c alternating-current,and, on the whole, the lat-ter is not quite as efficientas the direct-current. If,however, .full benefit…
Electrical engineering
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