ERDMANN, Oττo Linné (1804-1869) a German chemist, was the son of Karl Gottfried Erdmann, the physician who introduced vaccination into Saxony He was born at Dresden April 11, 1804. In 1820 and the following year he attended the lectures of the medico-chirurgical academy at Dresden, and in 1822 he entered the university of Leipsic, where he remained three years, devoting himself princi pally to the study of chemistry. In 1824 he received the degree of doctor of philosophy, and in 1825 that of licentiate of chemistry. In 1827 he became extraordinary professor, and in 1830 ordinary professor, of chemistry at Leipsic, the duties of which office he continued to discharge till his death at Leipsic, 9th October 1869. At Leipsic Erdmann established a chemical laboratory, which became the model of many similar institutions in Europe. He is best known for his discoveries regarding the qualities of nickel, and of indigo and other dye stuffs. In 1828, in conjunction with Werther, he founded the Journal fur technische und ökonomische Chemie, and later the Journal für prachtische Chemie. He is also the author of Ueber das Nickel (1827); Lehrbuch der Chemie (1828); Grundriss der Waarcukunde (1833); and Ueber das studium der Chemie (1861).