Shows cities and towns, railroads, coal, iron ore, and blast furnaces. "For the first annual report of Prof. E. T. Cox, State Geologist." Detached from: First annual report of the Geological Survey of Indiana ... 1869. Indianapolis : Alexander M. Conner, 1869., Imprint: [Indianapolis] : [Alexander M. Conner], [1869], Dimensions: 77 x 69 cm; Scale: Approximately 1:85,000
Levette, G. M. (Gilbert M.) (1869). Map of Clay Co., Ind.. Indiana. Geological Survey. https://purl.dlib.indiana.edu/iudl/images/VAC3073/VAC3073-M-00669 (map)