GERHARDT, CHARLES. - THE FORMATION OF ORGANIC COMPOUNDS.

Recherches chimiques sur l'Hellénine. (+) Sur la Constitution des Sels organiques à Acides complexes, et leurs Rapports avec les Sels ammoniacaux. (2 Papers).

(Paris, Crochard, 1839) No wrappers. In: "Annales de Chimie et de Physique, Par MM. Gay-Lussac et Arago.", tome 72, Cahier 2. Pp. 113-224 (the entire issue offered). Gerhardt's papers: pp. 163-183 and pp. 184-215.

First printing of two importent papers, the first paper is Gerhardt's first work, having the same subject as his doctoral theisis, 1840. The second paperis a classic study in organic chemistry in which Gerhardt breaks with the conceptions of dualism and pre-existing radicals, and sets forth his "Theory of Residues".

"A new aspect was given to the substitution-type theory by Gerhardt, who explained the formation of organic compounds as due to "pairing" or "copulation" of residues."(Findlay "A Hundred years of Chemistry" p. 30 ff).

Order-nr.: 45007