February 23, 1875: Beit known that I, J AMEs CHAPMAN BRYAN, of the city of Philadelphia, State ot' Pennsylvania, have invented new and useful Improvements in Earth-Batteries for electro-magnetic purposes | Poal: Say what you want.

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February 23, 1875: Beit known that I, J AMEs CHAPMAN BRYAN, of the city of Philadelphia, State ot' Pennsylvania, have invented new and useful Improvements in Earth-Batteries for electro-magnetic purposes (patents.google.com)

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[–] [deleted] • 0 pt

About as useful as a potato battery.

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