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 249
in fig. 2,093 consists essentially of ahermetically sealed glass bulb filled with, mercury vapor and pro-vided with four electrodes. The two upper electrodes are of solidmaterial and the two lower of mercury. The solid electrodes are the positive electrodes; the mercuryelectrodes are the negative… … Fig. 2,093.—Diagram of connections of Westinghouse-Cooper Hewitt mercury vapor rectifierarc light circuit. that it can be tilted to bring these two pools temporarily incontact for starting. The bulb contains highly attenuated vapor of mercury, which,like other metal vapors, is an electrical…
Electrical engineering
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