Modern practice of the electric telegraph. A handbook for electricians and operators (1872)
Pope, Frank L. (Franklin Leonard), 1840-1895 · New York : D. Van Nostrand · leaf 19
nt the liquid from comingin contact with it, and the surface of the plate also be-comes coated with a deposit of zinc, tending to convertthe battery into one in which both plates are of zinc,and thus its electro-motive force is weakened and finallydestroyed. In order to render the battery constant… … 11. THE DANIELL BATTERY.—This combination con-sists of a jar of glass or earthenware, F (fig. 3), about six GALVANIC BATTERIES. inches in diameter and eight or nine inches high. Aplate of copper, G, is bent into a cylindrical form, so asto fit within it, and is provided with a perforated cham-ber,…
Telegraph
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