NEW LONDON COUNTY, situated at the southeast corner of Connecticut, and traversed by Thames river, with the Connecticut on the west. Area, 600 square miles. Face of the country, hilly; soil, productive. Seats of justice, Norwich and New London. Pop. in 1810, 34,707; in 1820, 35,943; in 1830, 42,295; in 1840, 44,463; in 1850, 51,822.

NEW HAVEN COUNTY, situated In the south part of Connecticut, on Long Island sound. Area 540 square miles. Face of the country, undulating and hilly; soil productive. Seat of justice, New Haven. Pop. in 1810, 37,064; in 1820, 39,616; in 1830, 43,848; in 1840, 48,619; in 1850, 65,580.

MIDDLESEX COUNTY, situated on the south boundary of Connecticut, with Long Island sound on the south, and traversed by Connecticut river. Area, 342 square miles. Face of the country hilly; soil varied, but generally productive. Seat of justice, Middletown. Pop. in 1810, 20,723; in 1820, 22,408; in 1830, 24,845; in 1840, 24,879; in 1850, 27,216.

HARTFORD COUNTY, situated on the northern boundary of Connecticut, and traversed by Connecticut and Farmington rivers. Area, 727 square miles. Face of the country beautifully diversified with mountains and rich valleys; soil fertile, especially on the rivers. Seat of justice, Hartford. Pop. in 1810, 44,733; in 1820, 47,264; in 1830, 51,141; in 1840, 55,629; in 1850, 69,966.

FAIRFIELD COUNTY, situated at the southwest corner of Connecticut, with Long lsland sound on the south. Area, 630 square miles. Face of the country diversified with hills and valleys; soil well cultivated and productive. Seats of justice, Fairfield and Danbury. Pop. in 1810, 40,950; in 1820, 42,739; in 1830, 46,950; in 1840, 49,917; in 1850, 59,775.

SUFFOLK COUNTY, situated in the east part of Massachusetts, at the head of Massachusetts bay, comprising Boston, Chelsea, and the adjacent islands. Area, 116 square miles. Seat of justice, Boston. Pop. in 1810, 34,381; in 1820, 43,940; in 1830, 62,163; in 1840, 95,773; in 1850 144,507.

PLYMOUTH COUNTY, situated in the southeast part of Massachusetts, with Cape Cod bay on the east. Area, 600 square miles. Face of the country, generally level; soil, sandy and thin. Seat of justice, Plymouth. Pop. in 1810, 35,169; in 1820, 38,136; in 1830, 42,993; in 1840, 47,373; in 1850, 55,697.

NORFOLK COUNTY, situated in the southeasterly part of Massachusetts, with Massachusetts bay on the east. Area, 400 square miles. Face of the country uneven; soil productive. Seat of justice, Dedham. Pop. in 1810, 31,245; in 1820, 36,452; in 1830, 41,993; in 1840, 53,140; in 1850, 57,983.

NANTUCKET COUNTY, an island, situated off the southeast part of Massachusetts, in the Atlantic ocean. Area, 50 square miles. Face of the country, level; soil sandy, and generally poor. Seat of justice, Nantucket. Pop. in 1810, 6,807; in 1820, 7,266; in 1830, 7,202; in 1840, 9,012; in 1850, 8,454.

HAMPSHIRE COUNTY, situated toward the westerly part of Massachusetts, and traversed by Connecticut river. Area, 532 square miles. Face of the country greatly diversified; soil fertile. Seat of justice, Northampton. Pop. in 1830, 30,210; in 1840, 30,897; in 1850, 24,084.