Charles Frederic Gerhardt, a French chemist, born in Strasburg. Aug. 21, 1816, died there, Aug. 19, 1856. The son of a manufacturer of chemical products, he studied in 1835 in Liebig's laboratory at Giessen. and in 1844 was appointed professor at Montpellier, where he remained four years. He returned to Paris and established a private laboratory, in which he continued his researches till 1855, publishing papers upon homologous series, the theory of types, the anhydrous acids, and the starches. In 1855 he accepted the chair of chemistry and pharmacy at Strasburg. Among his most important publications is the Traite de cltimie organique (4 vols. 8vo, 1853-'6), upon which he was occupied a large portion of his life, and in which he presents a complete account of the actual progress of organic chemistry. The work was intended as an appendix to Ber-zelius's Chimie minerale.