ADAMS, JOHN QUINCY

(17671848), 6th president of U.S., and eldest i son of 2nd president; called to bar (1790); minister to the Hague (1794). While minister at Berlin (1797) was described as ablest of American diplomats. Elected to senate as member for Ma achusetts (1803); supported Jefferson in purchase of Louisiana; in 1806 denounced Britain for enforcing her claim to search and confiscate cargoes of neutral ve els; was minister at Petrograd (1809) and at London (1815); recalled to U.S. to become secretary of state (1817); elected president (1825-9).