By Frank B. Taylor ; A. Horn & Co. Baltimore ; Base from U. S. G. S. Bluffton and Columbus Grove atlas sheets ; U. S. Geological Survey George Otis Smith, Director. Relief shown by contours and spot heights. Legend shows "Beach gravel and sand" and "Ice ramparts, largely clay." Contour interval 10 feet," "datum is mean sea level." Railroads, waterways, buildings, cities and towns, stations.
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