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), 1833-1928 · New York : T. Audel & Co. · leaf 92
ching the metal caps full of small hole, then placing in a weaksolution of sal-ammoniac, allowing the cells to absorb all they will takeup. Do this only in emergency; if the holes be closed by soldering, thecells will last longer. 6. Extra service may be obtained by two run down series… … Fig. 3,948.—Sectional view showing construction of Edison cell. The solution should bemaintained 2% inches above plates. If solution level be low in any cell, hold battery outof service until renewal solution can be obtained. Normal charge. After batteryhas been practically discharged, the normal…
Electrical engineering
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