BUTLER COUNTY, situated in the western part of Pennsylvania. Length, 35 miles; mean width, 24; with an area of 840 square miles. The face of the country is generally hilly; soil fertile and well watered. Seat of justice, Butler. Pop. in 1820, 10,251; in 1830, 14,683; in 1840. 22,378; in 1850, 30,346.

BUCKS COUNTY, situated on the easterly boundary of Pennsylvania, on the westerly side of Delaware river. Length, 37 miles; mean breadth, 16; with an area of about 600 square miles. The face of the country is somewhat hilly and rolling, and the soil generally good and well cultivated. Seat of justice, Doylestown. Pop. in 1820, 37,642; in 1830, 45,740; in 1840, 48,107; to 1850, 56,091.

BRADFORD COUNTY, situated on the north boundary of Pennsylvania, and traversed by Susquehanna river. Length, 38 miles; mean width, 35; with an area of 1,330 square miles. The face of the country rocky and hilly, and the soil varied, but not very fertile. Seat of justice, Towanda. Pop. in 1820, 11,554; in 1830, 19,669; in 1840, 32,769; in 1850, 42,839.

BLAIR COUNTY, situated in the central part of Pennsylvania, and traversed by the Frankstown branch of Juniata river. Area, 700 square miles. Seat of justice, Hollidaysburgh. Pop. in 1850, 21,777.

BERKS COUNTY, situated in the southeastern part of Pennsylvania. Area, 1820 square miles. Seat of justice, Reading. Pop. in 1840, 64,569; in 1850, 77,129.

BEDFORD COUNTY, situated in the southern boundary of Pennsylvania, and drained by branches of Juniata and Potomac rivers. Length, 52 miles; mean breadth, 31; with an area of 1,600 square miles. The face of the country is extremely diversified by mountains, hills, and valleys, with an equally varied soil-barren and rocky in the mountains, and fertile and well watered in the valleys. Seat of justice, Bedford. Pop. in 1820, 20,248; in 1830, 24,502; in 29,335; in 1850, 23,052.

LEE COUNTY, situated in the north part of Illinois and traversed by Rock river. Area, 720 square miles. Seat of justice, Dixon. Pop. in 1840, 2,035; in 1850, 5,292.

LAWRENCE COUNTY, situated on the southeasterly boundary of Illinois, with Wabash river on the southeast. Area, 560 square miles. Seat of justice, Lawrenceville. Pop. in 1830, 3,668; in 1840, 7,092; in 1850, 6,122.

LAKE COUNTY, situated at the northeast corner of Illinois, on Lake Michigan. Area, 425 square miles. Seat of justice, Waukegan. Pop. in 1840, 2,634; in 1850, 14,226.

KENDALL COUNTY, situated on the northeasterly part of Illinois, and traversed by Fox river. Area, 324 square miles. Seat of justice, Yorkville. Pop. in 1850, 7,730.