The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 66
ept at this distance by ebonite separators. All thepositive plates are joined together by thick lead lugs, as areall the negative plates. The supports are so arranged thatthey keep the lower edges of the plates about \ inch from thebottom of the containing vessels (which may be of glass, BATTERIES…
Telephone
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