A blast furnace is a special type of furnace. They are used to make iron from ore. Blast furnaces are very large. They can be up to 60 metres (200 ft) tall and 15 metres (49 ft) in diameter.
Jonesborough, Tennessee. Jonesborough (historically also Jonesboro) is a town in, and the county seat of, Washington County, Tennessee, in the southeastern United States. The population was 5,975 at the 2010 census. It is Tennessee's oldest town.
Jonesville, North Carolina. Jonesville, originally called Allen's Settlement, is the oldest town in Yadkin County, North Carolina, United States, and was once recognized as the largest town west of Raleigh. The population was 2,285 at the 2010 census, however, it grew by nearly 800 residents in 2001 when it merged with neighboring Arlington.