Ewing, John D.D., a Presbyterian minister, and provost of the University of Pennsylvania, was born in Nottingham, Cecil County, Maryland, June 22, 1732, and graduated in 1754 in New Jersey College, of which he remained tutor for two years. Having completed his theological course, he was ordained, became instructor; in the College of Philadelphia, and was installed pastor of the first Presbyterian church, Philadelphia, in 1759. He visited England and Scotland in 1773 in behalf of the academy in Newark, Del., and returned in 1775 to the duties of his ministry. In 1779 he was appointed provost of the University of Pennsylvania, and professor of natural philosophy, in which science he delivered annually a course of learned lectures. In this station united with that of pastor, he continued to the end of life. He was also one of the vice-presidents of the American Philosophical Society. He died September 8, 1802. He published Lectures on Natural Philosophy (2 volumes, 8vo), and Sermons (8vo) — Sprague, Annals, 3:216.