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.
The city of Smithville was founded in 1838 as the county seat of DeKalb county. It was named in honor of Samuel Granville Smith, a former state senator and the first mayor of Gainsboro. He died in 1835 while serving as Tennesseeâs secretarty of state.