JUNIATA COUNTY, situated toward the southerly part of Pennsylvania. Area, 360 square miles. Face of the country hilly; soil productive. Seat of justice, Mifflintown. Pop. in 1830, 7,672; in 1840, 11,080; in 1850, 13,029.

JEFFERSON COUNTY, situated toward the westerly part of Pennsylvania. Area, 1,200 square miles. Face of the country hilly; soil of middling quality. Seat of justice, Brookville. Pop. in 1810, 161; in 1820, 561; in 1830, 2,225; in 1840, 7,253; in 1830, 13,516.

INDIANA COUNTY, situated toward the westerly part of Pennsylvania, with Kiskiminitas river on the southwest. Area, 770 square miles. Face of the country hilly; soil, mostly sterile. Seat of justice, Indiana. Pop in 1810, 6,214; in 1820, 8,882; in 1830, 14,251; in 1840, 20,782; in 1850, 27,070.

HUNTINGDON COUNTY, situated toward the southern part of Pennsylvania, and traversed by Juniata river. Area, 1,276 square miles. Face of the country mountainous; soil barren, except on the streams. Seat of justice, Huntingdon. Pop. in 1810, 14,778; in 1820, 20,142; in 1830, 27,159; in 1840, 35,484; in 1850, 24,786.

BURKE COUNTY, situated on the northeast boundary of Georgia, on the southwest side of Savannah river. Length, 40 miles; mean breadth, 24, with an area of 960 square miles. The face of the country is generally undulating, and the soil of middling quality. Seat of justice, Waynesborough. Pop. in 1820, 11,576; in 1830, 17,888; in 1840, 13,176; in 1850, 16,100.

GREENE COUNTY, situated at the southwest corner of Pennsylvania, with Monongahela  river on the east. Area, 576 square miles. Face of the country hilly; soil fertile. Seat of justice, Waynesburgh. Pop. in 1810, 12,544; in 1820, 15,554; in 1830, 18,028; in 1840, 19,147; in 1850, 22,136.

FRANKLIN COUNTY, situated on the southerly boundary of Pennsylvania. Area, 734 square miles. Face of the country diversified with mountains, hills, and valleys; soil varied, consisting principally of two formations; one of slate, extending through the northwesterly part, and is much more of a productive soil. Seat of justice, Hambersburgh. Pop. in 1810, 23,083; in 1820, 31,192; in 1830, 35,103; in 1840, 37,739; in 1850, 39,904.

FAYETTE COUNTY, situated in the southwesterly part of Pennsylvania, with Monongahela river on the west. Area, 824 square miles. Face of the country broken with hills and mountains; soil fertile. Seat of justice, Union. Pop. in 1810, 24,714; in 1820, 27,285; in 1830, 29,237; in 1840, 33,574; in 1850, 39,312. 

ERIE COUNTY, situated at the northwesterly corner of Pennsylvania, south of Lake Erie. Area, 720 square miles. Face of the country undulating; soil fertile. Seat of justice, Erie. Pop. in 1810, 3,758; in 1820, 8,553; in 1830, 16,906; in 1840, 31,344; in 1850, 38,742.