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.
Euro-American settlers first came to the area of Smithville in 1808. Smithville became the county seat of modern day Lawrence County in 1837. The county seat was later moved to Powhatan in 1869, after the Civil War. This was done in part to take advantage of riverboat commerce along Black River.