Rick, The book A History of Industry in Jackson County Ohio compiled and Edited by Frank C. Morrow, Wellston Ohio 1956 has quite a lot about salt, iron, coal, ceramics, cement, etc. I checked for Midland Furnace and didn't find anything for Heidi. I found the following on Franklin Furnace. "In 1820, Daniel Young, a native of New Hampshire, arrived in Scioto County and settled on land east of the Little Scioto River. He named the place Concord in honor of the capital of his native state. The name was later changed to Wheelersburg. He and a number of others from his native state organized The Ohio Iron Company and built a plant fourteen miles east of Portsmouth and named it Franklin Furnace. This furnace, put in blast in 1827, was the first to make iron in Scioto County. H. S. Willard who later became prominent in the furnaces at Wellston learned the art of iron making at Franklin Furnace." Furnaces listed are: [Not all of these are iron furnaces] Buckeye, Cambria, Cornelia, Franklin, Globe, Hopewell, Huron, Jackson, Jefferson, Jisco, Keystone, Latrobe, Lincoln, Madison, Milton, Monroe, Ophir, Orange, Pine Grove, Salt Lick, Saugus Star, Tropic, Union, Young America Furnace. Some reference material you might check or have someone who has access to them check are: History of The Iron and Steel Industry in Scioto County, Ohio by Frank H. Rowe. History of the Hanging Rock Iron Region I hope this was of some help, June Jacobs Jordan