The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 65
by casting a gridof lead (hardened by antimony) round a number of squareor hexagon blocks made up of a mixture of the two chloridesmentioned above, and afterwards subjecting the plate so con-structed to an electro-chemical process, by which the zincchloride is dissolved out, and the lead chloride… … Scale } Fi2. 25 of crimped lead ribbon; the crimping gives the lead a porouscharacter. The cells are made up of a number of plates constructed asabove, and so arranged that there is alternately a positiveand a negative plate; but the two outer plates are usuallyboth negatives, so that there is one…
Telephone
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