Telegraph engineering : a manual for practicing telegraph engineers and engineering students (1922)
Hausmann, Erich, 1886- · New York : D. Van Nostrand Company · leaf 38
Fig. 14. Edison storage battery, and also the positive (at the right)and negative plates. Storage cells may be charged directly from direct-currentservice mains or through boosters and motor-generators.If only alternating current is available, it may be changedinto direct current for the charging…
Telegraph
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