Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 173
rcharged tear off the insoluble sulphate. 177. Construction of the Plates.—When fully charged, the posi-tive plates are chocolate in color and the peroxide is hard whilethe negative plates are gray in color and the spongy lead is so softthat it can be scraped off with the finger nail. During… … Fig. 165.—Plante plate, showing cross section. sulphate is formed rapidly and loosely. The negative plate inaddition must be so designed that the soft material will not bereadily washed off. There are two ways of forming the active material. By thePlante process the material is formed…
Electrical engineering
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