ELK COUNTY, situated in the northwesterly part of Pennsylvania. Area, ----- square miles. Seat of justice, Ridgeway. Pop. in 1850, 3,496.

DELAWARE COUNTY, situated in the southeast part of Pennsylvania, with Delaware river on the southeast. Area, 220 square miles. Seat of justice, Chester. Pop. in 1820, 4,810; in 1830, 17,361; in 1840, 19,791; In 1850, 24,679.

JEFFERSON COUNTY, situated in the easterly part of Georgia, and traversed by Ogeechee river. Area, 660 square miles. Face of the country undulating; soil sandy. Seat of justice, Louisville. Pop. in 1810, 6,111; in 1820, 7,058; in 1830, 7,309; in 1840, 7,254; in 1850, 9,131.

OXFORD COUNTY, situated on the west boundary of Maine, and traversed by the Androscoggin and Oxford and Cumberland canal. Area, 1,600 square miles. Face of the country, hilly; soil, of middling quality. Seat of justice, Paris. Pop. in 1810, 17,630; in 1820, 27,104; in 1830, 35,217; in 1840, 38,351; in 1850, 39,763.

ROCKBRIDGE COUNTY, situated in the central part of Virginia and traversed by James river. Area, 680 square miles. Face of the country, agreeably diversified; soil, of middling quality. Seat of justice, Lexington. Pop. in 1810, 10,318; in 1820, 11,945; in 1830, 14,244; in 1840, 14,284; in 1850, 16,055.

SPRINGFIELD, p. v., seat of justice of Sangamon co., and capital of the state of Illinois; from W. 780 ms. The town is situated four miles south of Sangamon river, and became the capital of the state in 1840. It is surrounded by a rich and populous region, picturesquely varied with prairies, forests, vales, and gentle elevations.