Shows soil types classification by colors and symbols. 'Field operations Bureau of Soils 1916.' 'Snyder & Black, N.Y.' Scale 1:63,360. 1 inch = 1 mile. U.S. Dept of Agriculture, Bureau of Soils; State of Indiana, Department of Geology; soils surveyed by Grove B. Jones, of the U.S. Department of Agriculture and J. Bayard Brill, of the Indiana Department of Geology.