Flint. I. Austin, an American physician, born in Petersham, Mass., Oct. 20, 1812. He was educated at Amherst and Harvard colleges, and graduated M. D. at Harvard in 1833. After practising successively in Boston and Northampton, he removed in 1836 to Buffalo; in 1844 was appointed professor of the institutes and practice of medicine in the Rush medical college at Chicago; resigned after one year, and in 1846 established the " Buffalo Medical Journal," which he edited for ten years. In connection with Professors White and Hamilton he founded in 1847 the Buffalo medical college, in which he was for six years professor of the principles and practice of medicine and of clinical medicine. From 1852 to 1856 he filled the chair of the theory and practice of medicine in the university of Louisville, Ky., and then accepted a professorship of pathology and clinical medicine in Buffalo. His essays "On the Variations of Pitch in Percussion and Respiratory Sounds," and "On the Clinical Study of the Heart Sounds in Health and Disease," received the first prizes of the American medical association in 1852 and 1859. A translation of the former of these and of his clinical reports appeared in Paris in 1854. From 1858 to 1861 he spent the winters in New Orleans as professor of clinical medicine in the school of medicine and visiting physician to the charity hospital.

In 1859 he removed to New York, where two years later he was appointed visiting physician to the Bellevue hospital, professor of the principles and practice of medicine in the Bellevue hospital medical college, and of pathology and practical medicine in the Long Island college hospital. He has published "Clinical Reports on Continued Fever" (Buffalo. 1852);Clinical Report on Chronic Pleurisy (1853); Clinical Report on Dysentery" (1853);Physical Exploration and Diagnosis of Diseases affecting the Respiratory Organs" (1856; 2d ed., 1866); Practical Treatise on the Pathology, Diagnosis, and Treatment of Diseases of the Heart" (1859; 2d ed., 1870); and a "Treatise on the Principles and Practice of Medicine (1866). This work has been highly successful, and has passed through four editions, the last of which appeared in 1873. In 1872 Dr. Flint was elected president of the New York academy of medicine.

II. Austin, jr., an American physician, son of the preceding, born in Northampton, Mass., March 28, 1836. He attended medical lectures in 1854 '6 at the university of Louisville, Ky., and afterward at the Jefferson medical college in Philadelphia, where he took his degree in 1857. For the next two years he resided in Buffalo, where he became editor of the "Buffalo Medical Journal," and was appointed attending surgeon to the Buffalo city hospital, and professor of physiology and microscopical anatomy in the medical department of the university of Buffalo, delivering one course of lectures in 1858-'9. He then removed with his father to the city of New York, and was almost immediately appointed professor of physiology in the New York medical college. In 1860 he accepted the chair of physiology in the New Orleans school of medicine. The following spring he visited Europe for professional study, following the courses and receiving the special instruction of Robin and Claude Bernard. In 1861, on the organization of the Bellevue hospital medical college in New York, he was appointed professor of physiology and microscopic anatomy in that institution, which position he still holds (1874). He was also for several years professor of physiology in the Long Island college hospital at Brooklyn. Besides attaining an extensive and thorough acquaintance with the literature of physiology, he has made many original experiments and observations, and has largely contributed to the advancement of the science by important articles in the medical journals and by separate publications.

His article on A New Excretory Function of the Liver," in the "American Journal of the Medical Sciences for October, 1862, received in 1869 an honorable mention and a recompense of 1,500 francs from the committee of the French academy of sciences on the Monthyon prize of medicine and surgery. His most important work is "The Physiology of Man," to be completed in five volumes, of which four have appeared, viz.: vol. i., on "The Blood, Circulation, and Respiration" (New York, 1866); vol. ii.,Alimentation, Digestion, Absorption, Lymph, and Chyle" (1867); vol. iii.,Secretion, Excretion, Ductless Glands, Nutrition, Animal Heat, Movements, Voice, and Speech" (1870); vol. iv., "On the Nervous System" (1872). He has also published a "Manual of Chemical Examination of the Urine in Disease" (1870).