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), 1833-1928 · New York : T. Audel & Co. · leaf 412
ched, in this matter of compensation, at which any increase otcurrent would increase the resistance of the ballast more than it would decrease the re-sistance of the glower, and since the lamp# is invariably used on a constant pressure circuit,no increase of current can occur when this condition is… … Fig. 3,448.—Nitrogen filled lamp. Tungsten lamps fail not by breaking of the filament, butby reduction in light giving value due to blackening of the inner globe surface. Withattempts to increase efficiency of lamp operation, this blackening process has been foundto be greatly accelerated, thus…
Electrical engineering
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