Electricity experimentally and practically applied; a book for the beginner and for the practical man, principles, experiments, practical applications and problems (1910)
Ashe, Sydney Whitmore · New York, D. Van Nostrand company · leaf 116
the battery, Fig. 129. A voltmeter should be connected across the terminals of the battery, and a hydrometer should be placed in the liquid of the cell to note whenthe specific gravity ofthe cell is normal. Atest hydrometer similarto that developed by theElectric Storage BatteryCo., Fig. 130, may… … Fig. 131. — Charging Circuit. PRIMAR Y AND STORA GE BA TTERIES 95 charged, it gases badly. Battery charging circuits employ-ing lamps and adjustable resistances are shown in Figs.131, 132.
Electricity · Electrical engineering
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