Appletons' Cyclopædia of American Biography/Schweinitz, Emil Alexander de

SCHWEINITZ, Emil Alexander de, chemist, b. in Salem, N. C., 18 Jan., 1855. He is the son of Bishop E. A. de Schweinitz of the Moravian church, and was graduated at the University of North Carolina in 1882. Subsequently he became instructor in that institution, but electing chemistry as his profession he studied at Göttingen, where in 1886 he received the degree of Ph. D. On his return he entered the chemical division of the agricultural department in Washington, and became in 1890 director of the biochemic laboratory of the agricultural department. He is also professor of chemistry in the Columbian university medical school, of which faculty he is the dean. Dr. de Schweinitz is a member of a number of scientific societies both in this country and abroad, and in 1896 was president of the Washington chemical society. His scientific work has included numerous investigations in connection with his specialty, results of which have been published, and the more important of which are the followlowing: “A Chemical Study of the Osage Orange as a Substitute for the Mulberry in rearing Silkworms” (1889); “The Poisons produced by the Hog Cholera Germ” (1890); “The Production of Immunity to Swine Plague by Use of the Products of the Germ” (1891); “The Use of Mallein and its Active Principles” (1892); “A Preliminary Study of the Poisons of the Tuberculosis Bacillus and the Practical Value and Use of Tuberculin” (1892); “Artificial Media for Bacterial Cultures” (1893); “The Effect of Tuberculin on the Milk of Cows” (1894); “The Chemical Composition of the Tuberculosis and Glanders Bacilli” (1895); “A Hygienic Study of Oleomargarine” (1896); and “The War with the Microbes” (1897).