Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 253
LAMPS. EFF OF SY5TEM B8 2 I 7 5 AMP AC ENCLOSED L*MPS 6.6 AMP. METALLIC FLAME ORirr :r SYSTEM 90.2% 66 AMP D.C ENCLOSED LAMPS EFF OF SYSTEM 66 5% Figs. 2.096 to 2,098.—Westinghouse diagrams showing comparative efficiencies of differentsystems of series arc lighting. pass into the mercury vapor but… … Fig. 2.099.—Westinghouse CooperHewitt mercury vapor rectifiet bulb.It consists essentially of a hermetic-ally seaied glabS bulb filled withhighly attenuated vapor of mercury,and provided with electrodes. Itsoperation is fully explained in theaccompanying text. f ig. 2,100.— Westinghouse-Cooper…
Electrical engineering
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