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 278
allowed to soak for three or four hours.The jars may be used for this purpose. After rinsing anddrying, they are ready to be put away; wash also the rubberseparators. Wood separators, after having been in service, will not stand muchhandling and had better be thrown away. If it be thought worth… … Fig. 1.178.—The Witham charging board, for charging from any electric outlet on a directcurrent system. The instrument shows the direction of the current, and the candlepower of the lamps used as resistance indicates approximately the strength of the currentpassing. Operation: From any convenient…
Electrical engineering
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