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Bulletin. Science. Figure 21.âGrove battery as used in American telegraphy. From G. B. Prescott, History, Theory, and Practice oj the Electric Telegraph, Boston, i860, p. 68, fig. 7. Plante was able
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Callaud gravity cell: improved battery with a copper electrode and a zinc anode in a jar filled with copper sulfate. The invention became the preferred battery for telegraph. Stock Illustration | Adobe
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How did they charge the batteries for telegraph keys in the 1800s? There were no electric generators. - Quora
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