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In February, 1816, Dr. Thomas Thomson printed, in the Annals of Philosophy, that Dr. Redman Coxe, Professor of Chemistiy at Philadelphia, in the United States, had informed him that he contemplated galvanism as a probable means of establishing telegraphic communications, and nominally by the evolution of gases from water. Coxe promised to follow up the idea, but he added that it would demand time. The Abbé Moigno, at Paris, states in both editions of his Traité de Télégraphie électrique (1849 and