POPKIN, John Snelling, clergyman, born in Boston, Massachusetts, 19 June, 1771; died in Cambridge, Massachusetts, 2 March, 1852. His ancestors, of Welsh descent, came to this country from Ireland, and his father, John, was a lieutenant-colonel in the Revolutionary army. He was graduated in 1792, with the first honors, at Harvard, where he was tutor in Greek in 1795-'8, after teaching in Woburn and Cambridge. He had also studied theology, was licensed to preach in 1798, and on 16 July, 1799, was ordained pastor of the Federal street church in Boston. where he remained till 1802. He was pastor at Newbury in 1804-'15, then professor of Greek at Harvard on the college foundation till 1826, and Eliot professor of Greek literature, to succeed Edward Everett, till 1833. Prom the latter date till his death he lived in retirement in Cambridge. Harvard gave him the degree of D. D. in 1815, and he was a member of the American academy of arts and sciences. Dr. Popkin left the Unitarian faith for the orthodox Congregational, and finally became an Episcopalian. He was a profound Greek scholar. He edited the fourth American edition of Andrew Dalzel's "Collectanea Graeca Majora" (2 vols., Cambridge, 1824), and was the author of various occasional sermons, a Greek grammar (1828), and "Three Lectures on Liberal Education" (1836). These last, with selections from other lectures, extracts from his sermons, and a memoir by Cornelius C. Felton, appeared after his death (1852).