68 
IOWA ACADEMY OF SCIENCE Vol. XXIV, 1917 
1834. 
Schoolcraft, H. R., Remarks on the Lead Mine Country on the Upper 
Mississippi (Addressed to the Editors of the New York Mirror), pp. 
294-307, especially p. 306, in Schoolcraft’s Narrative of an Expedition 
through the Upper Mississippi to Itasca Lake, etc., in 1832, New York. 
1836. 
Feather stonhaugh, G. W., Report of a Geological Reconnoissance 
in 1835 from the Seat of Government by the way of Green Bay and 
the Wisconsin Territory to the Coteau du Prairie, Senate Document 333. 
1840. 
Owen, D. D., Report of a Geological Exploration of Parts of Iowa, 
Wisconsin, and Illinois: House Ex. Doc. No. 239, 26th Cong., 1st sess., 
161 pp. 
1841. 
Nicolett, J. N., Report Intended to Illustrate a Map of the Hydro- 
graphical Basin of the Upper Mississippi River, made by J. N. Nicollet, 
February 16, 1841: Senate Doc. No. 237, 26th Congress, 2d sess. 
1842. 
Hodge, J. T., On the Wisconsin and Missouri Lead Region: Am. 
Jour. Sci., ser. 1, Vol. 43, pp. 35-72. 
1844. 
Lapham, I. A., A Geographical and Topographical Description of 
Wisconsin, p. 59, Milwaukee. 
Owen, D. D., Report Geol. Expl. Iowa, Wisconsin, and Illinois in 1839: 
Senate Ex. Doc. No. 407, 28th Cong., 1st sess. 
1846. 
Lapham , I. A., Wisconsin, its Geography and Topography: Senate Ex. 
Doc. No. 87, 29th Cong., 1st sess., p. 57. 
1847. 
Feather stonhaugh, G. W., A Canoe Voyage up the Minnay Sotor, 2 
Vols., (on Wisconsin and Mississippi Rivers) Vol. I, pp. 191-258, 270- 
273; Ibid., Vol. II, pp. 15-22, 28-33, 113, Lond’on. 
1848. 
Norwood, J. G., In Owen’s Geological Reconnoissance of the Chippewa 
Land District of Wisconsin: Senate Ex. Doc. No. 57, 30th Cong., 1st 
sess., p. 105. 
Owen, D. D., Report of a Geological Reconnoissance of the Chippewa 
Land District of Wisconsin: Senate Ex. Doc. No. 57, 30th Cong., 1st 
sess., 134 pp. 
