DANIELL, J. FREDERIC.

On the Electrolysis of Secondary Compounds. In a Letter to Michael Faraday. Received May 15, - Read June 13, 1839. (+) Second Letter on the Electrolysis of Secondary Compounds, Addressed to Michael Faraday. Received April 30, - ead May 21, 1840. (2 Papers).

(London, Richard and John E. Taylor, 1839 a. 1840). 4to. No wrappers as extracted from "Philosophical Transactions" 1839 - Part I. Pp. 97-112. One textillustr. And !840 - Part I. Pp. 209-224.

First printing of 2 importent paper in which the inventor of the "Daniell Cell" records his experiments with the strong battery on electrolysis of some compounds.
"The use of such cells, often coupled together in long chains to give a large electromotive force, gave great impetus to research in all branches of current electricity and also lead to commercial applications in gilding, electroplating, and glyphography." (DSB III, p. 557).

In 1831 Daniell was appointed profesor 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.: 42807