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.
Cities & Towns. Jonesboro. Jonesboro, one of the state's most progressive cities, was established in 1859 among the rolling hills of Crowley's Ridge in northeast Arkansas. Downtown is filled with gift shops, restaurants, art galleries, a day spa and an active civic center called the Forum.