COLUMBIA  , a

city and the county-seat of Maury county, Tennessee, U.S.A., situated on the Duck river, in the central part of the state, 46 m . S. of Nashville . Pop . (1890) 5370; (1900) 6052 (2716 negroes); (1910) 5754 . Columbia is served by the Louisville & Nashville, and the Nashville, Chattanooga & St Louis railways . It is the seat of the Columbia Institute for girls (under Protestant Episcopal control), founded in 1836, and of the Columbia Military Academy . Columbia is in a fine farming region; is engaged extensively in the mining and shipping of phosphates; has an important trade in live-stock, especially mules; manufactures cotton, lumber, flour, bricks, pumps and woollen goods; and has marble and stone works . Columbia was settled about 18o7 and was incorporated in 1822 . During the Civil War it was the base from which General N . B . Forrest operated in 1862–1863, and was alternately occupied by Con-federate and Federal forces during General Hood's Nashville campaign (November-December 1864) .