American physician, born in Philadelphia, PA, on the 30th of October 1813. After his graduation at the University of Pennsylvania in 1832, and the medical department in 1836, he spent two years in foreign study. He was appointed professor of the theory and practice of medicine in the Pennsylvania Medical College, and in 1864 was appointed to the same chair in the University of Pennsylvania department of medicine, a place he retained until 1884. He published several medical works; among them are the following: Medical Instruction in the United States (1845); The Unity of Medicine (1856); and Therapeutics and Materia Medica (1860).