Smith, Theobald, 1859–1934, American pathologist, b. Albany, N.Y., M.D. Albany Medical College, 1883. He was professor of bacteriology at Columbian (now George Washington) Univ. (1886–95) and of comparative pathology at Harvard (1896–1915) and served (1915–29) as director of the department of animal pathology at Rockefeller Institute (now Rockefeller Univ.). He demonstrated the etiology of Texas cattle fever, differentiated between human and bovine tubercle bacilli, and, in his work on immunity, noted the allergylike reaction later investigated by Richet.