PREVIOUS PUBLICATIONS RELATING TO THE REGION. 



The following is a list of all publications relating in any specific 

 way to the region, that have come to my knowledge. And as the na- 

 ture and limits of this report preclude, for the most part, specific ref- 

 erence to the contents of these publications, either in commendation 

 or criticism, it is hoped that this mention will be accepted as an ac- 

 knowledgment of the credit due their authors: 



Report of a Geological Reconnoissance, made in 1835, from the Seat of Government, by 

 Green Bay, in the Wisconsin Territory, to the Couteau de Prairie. By George W. 

 Featherstonhaugh, Washington. 1836. 8 vo., pp. 168. 



On the Existence of certain Lacustrine Deposits, in the vicinity of the Great Lakes, usu- 

 ally confounded with the Drift. By I. A. Lapham. Am. Jour, of Science, 2d Se- 

 ries, vol. 3, p. 90. 1847. 



On the Geology of the Southeast Portion of Wisconsin, not heretofore surveyed. By I. 

 A. Lapham. Included in Foster and Whitney's Report on the Geology of the Lake 

 Superior Land District. Part 2d, pp. 167, et seq. Washington. 1852. 



Geological Formations of Wisconsin. By I. A. Lapham. Transactions of Wisconsin 

 State Agricultural Society. Vol. 2d. 1851, pp. 122, et seq. 



A Geological Map of Wisconsin. By I. A. Lapham. 1855. 



Report of a Geological Survey of Wisconsin, Iowa and Minnesota, and a portion of Ne- 

 braska. By D. D. Owen. Philadelphia. 1852. The chapters relating to this dis- 

 trict are by Col. Whittlesey. 



Annual Report of the Geological Survey of Wisconsin. By James G. Percival. Madi- 

 son. 1855. Ditto, 1856. 



Annual Report of the Geological Survey of Wisconsin. By Edward Daniels. Madi- 

 son. 1857. 



Report of Progress, on behalf of the Geological Commission of Wisconsin. By James 

 Hall. Executive Message and Documents. 1859. 



Descriptions of New Species of Fossils from the Northwestern States. By J. H. McChes- 

 ney. Chicago. 1859. 



On Drift Cavities, or Potash Kettles of Wisconsin. By Chas. Whittlesey. Proceedings 

 American Association for the Advancement of Science. Vol. 13. p. 297. Spring- 

 field. 1860. 



Report of the Superintendent of the Geological Survey of Wisconsin. By James Hall. 

 January 1, 1861. Executive Message and Documents. 



Report of the Geological Survey of Wisconsin. Vol. 1. By James Hall. Madison. 

 January, 1862. 



On the Fresh Water Glacial Drift of the Northwestern States. By Charles Whittlesey. 

 Smithsonian Contributions to Knowledge. Washington. December, 1866. 



