History, theory, and practice of the electric telegraph (1866)
Prescott, George B.(George Bartlett),1830-1894 · Boston, Ticknor and Fields · leaf 53
attery Fig. 1,the wooden pieces rest upon the glasses. In battery Fig. 2, theyrest on iron brackets against supports. This battery is based upon the principles of the Smee pile, butis an improvement in form and in the mode of connecting thecells. They have been in extensive use for about five… … Fig. 13 cast iron, insulated at the top from the plate clamps with Protean rubber. Fig. 14 represents zincplates for the above battery. Fig 15 represents a pocket bat-tery in its case, which occupies aspace only eight inches long, fiveinches high, and two inches deep.It is charged in twenty…
Telegraph
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