Adams, John Quincy, born in 1767, son of President John Adams and sixth president to the United States. Studied at Leyden and Harvard, and was admitted to the bar in 1791. He entered the diplomatic service and was successively American minister in Holland, England and Prussia, and as senator (1804-1808), he supported Jefferson's Embargo Act. From 1806-1809 he occupied the chair of rhetoric at Harvard College. After holding various offices, he was elected president to the United States in 1825, and being returned to Congress in 1830, became a vigorous supporter of the Abolitionists. Author of "Letters on Silesia," "Lectures on Rhetoric," and a poem "Dermot MacMorrogh." Died, 1848.