ERDMANN, OTTO LINNE (1804-1869), German chem ist, son of Karl Gottfried Erdmann (1774-1835), the physician who introduced vaccination into Saxony, was born at Dresden on April II, 1804. He studied at the University of Leipzig where in 1827 he became extraordinary professor, and in 1830 ordinary professor of chemistry. This office he held until his death at Leipzig on Oct. 9, 1869. The laboratory established at Leipzig under his direction in 1843 was long regarded as a model institu tion. As an investigator he is best known for his work on nickel and indigo and other dye-stuffs. With R. F. Marchand (1813 5o) he also carried out a number of determinations of atomic weights. In 1828, in conjunction with A. F. G. Werther (1815 69), he founded the Journal fur technische and okonomische Chemie, which became in 1834 the Journal fur praktische Chemie. He was also the author of Ober das Nickel (1827), Lehrbuch der Chemie (1828), Grundriss der Waarenkunde (183 3) and fiber das Studium der Chemie (1861).