Side A: To furnish the needs of the early settlers, then to furnish ordnance for a nation at war, and finally to furnish merchant iron to the steel mills, 100 iron producing blast furnaces were built within these 1,800 square miles of the lower coal measures to become known as the Hanging Rock Region. Lawrence County, centrally located within the Region, had 23 blast furnaces constructed between 1826 and 1909.