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Calendar of Discovery and Invention


March 20, 1800.—It was in his letter addressed “a Como en Milanois, ce 20 m Mars 1800,” that Volta communicated to Sir Joseph Banks his discovery of the voltaic pile. The letter arrived in parts, but the whole was read to the Royal Society on June 26, 1800. From the information contained in the first part, Nicholson and Carlisle made a pile with 36 halfcrowns and 36 zinc discs, and with this they decomposed water.

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