Modern practice of the electric telegraph : a handbook for electricians and operators (1874)
Pope, Frank L., 1840-1895 · New York : D. Van Nostrand · leaf 23
ence in their respective specific grav-ities. Some of these bid fair to come into extensiveuse. 20. The Grove Battery.—The most intense andpowerful voltaic combination that has yet been dis-covered is that of Grove. For many years it was ex-clusively used for telegraphic purposes in this… … Fig. 5. inches in diameter and Ah inches high. A thick cylin-der of zinc, B, of a size nearly sufficient to fill the turn-bier, is placed within it, and is furnished with a project-ing arm, to which is attached the positive plate of thenext element. The porous cup, C, is placed within thezinc. A…
Telegraph
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