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 220
drometer syringe; a.convenient device for testing electricvehicle cells. By slightly compressingthe bulb and inserting the slender tube through the vent hole in the cover of the cellsufficient acid may be drawn up to float the hydrometer within the large glass tube, andthe reading can be made at… … STORAGE BATTERIES 909 Oues. What may be said with respect to impurities inthe electrolyte? Ans. The electrolyte should be free from chlorine, nitrates,acetates, iron, copper, arsenic, mercury, and the slightest traceof platinum. Mercury alone has no injurious effect unless it be present in…
Electrical engineering
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