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 115
, laboratory, or any place where acidfumes are prevalent, this latter precaution i? important, because thefumes may attack the slide wire. It is also well to keep the contact surfaces of the switch studs clean andbright by wiping them occasionally \snth a soft cloth dipoed in vaseline. … yftf. e/ leads on each end li eoutJ fo 10 dinuonief slie/e ivire. The j/tde w/ire n dvided mfa1000 paiii -20 for the Uadi, or S80 ditijiam .Calibrated Scale en GaUanomefmr Ir •^s Fig. 617.—Diagram of Leeds and Korthrup bridge for locating faults in power circuits, showingarrangement of the…
Electrical engineering
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