Depth shown by soundings. Title from caption. Detached from: The lakes of northern Indiana and their associated marl deposits / W. S. Blatchley and Geo. H. Ashley. In Indiana Department of Geology and Natural Resources twenty-fifth annual report ... 1900. Indianapolis : Wm. B. Burford, 1901. Page 296.
Imprint: [Indianapolis] : [Indiana, Department of Geology and Natural Resources], [1901]; Imprint: [Indianapolis] : [Wm. B. Burford], [1901]
Dimensions: 22 x 21 cm; Scale: Approximately 1:21,500