JACKSON, David, physician, born in Oxford, Chester County, Pennsylvania, about 1747; died in Philadelphia, Pennsylvania. in 1801. He was graduated in medicine at the College of Pennsylvania in 1768, and practised in Philadelphia. On 3 December, 1776, he was appointed paymaster of the 2d battalion of Philadelphia mill-tia, and on 23 October, 1779, became quartermaster of the militia in the field. He was appointed hospital physician and surgeon, 30 September, 1780, and was in service at Yorktown when Cornwallis surrendered, 19 October, 1781. From 18 April till 11 November, 1785, he was a delegate to congress, after which he retired from public life and became all apothecary in Philadelphia.--His son, Samuel, physician, born in Philadelphia, 22 March, 1787; died there, 4 April, 1872, was educated at the University of Pennsylvania, and was graduated at the medical department in 1808. For several years he conducted his father's drug-store, and during this period became a member of the 1st troop of city cavalry, and served as a private in Delaware and Maryland during the campaign of 1814. In 1815 he began to practise medicine in Philadelphia, and in 1820 became president of the board of health, making a special study of yellow fever. In 1821 he was appointed professor of materia medica in the Philadelphia college of pharmacy, of which he was a founder, and served until 1826. In 1827 he was chosen assistant to Professor Nathaniel Chapman in the University of Pennsylvania. In 1832, in anticipation of an epidemic of Asiatic cholera, Dr. Jackson was placed at the head of a commission of physicians that visited Canada, where the disease first appeared, and his reports were published in pamphlet-form. During its prevalence in Philadelphia, he had charge of City cholera hospital, No. 5. He was appointed professor of the institutes of medicine in the University of Pennsylvania, and held this office from 1835 till 1863, when he resigned, and was afterward emeritus professor till his death. He was known in Philadelphia as "Professor" Samuel Jackson, to distinguish him from another physician in practice at the same time known as Dr. Samuel Jackson "of Northumberland." Professor Jackson made some reputation as a lecturer, and read before the Academy of sciences in Paris, in 1818, a paper upon "Mediate Auscultation." he was the author of " Principles of Medicine" (Philadelphia, 1832); "Discourse Commemorative of Professor Nathaniel Chapman" (1854); an introduction to J. Cheston Morris's "Translation of Lehmann's Chemical Physiology" (1855); and "Medical Essays."