DANIELL, J. FREDERIC. - THE DANIELL-CELL.

Further Obervations on Voltaic Combinations. In a Letter addressed to Michael Faraday. Received March 30, - Read April 6, 1837.

(London, Richard and John E. Taylor, 1837). 4to. No wrappers as extracted from "Philosophical Transactions" 1837 - Part I. Pp. 141-160 and 1 engraved plate.

First appearance of Daniell's second paper on the construction of the famous "Daniell-Cell". In 1836 (in a paper in the Transactions, also addressed to Faraday with the title "On Voltaic Combinations"), he announced his invention of the battery. In his second paper, the paper offered here, he further develops his invention. In the new invention by Charles Wheatstone of the electric telegraph in 1837, the Daniell cell was used as the electric source.

In 1831 Daniell was appointed proffesor of Chemistry at King's College London. He invented several scientific instruments, including a hygrometer for measuring humidity he is best known for his work in electrochemistry, his interests having been aroused by the work of his good friend faraday. Volta's battery had the defect of rapid diminution in current. What was needed, however, was a battery yielding a constant current over a considerable lenght of time. In 1836 Daniell succeeded, producing the Daniell cell, of copper and zinc. his was the first reliable source of electric current.

Order-nr.: 42342