MUSEUM OF COMrAUATIVE ZOOLOGY. 155 



Account of tlie Native Copper on the Southern Shore of Lake Superior, with 

 Historical Citations and Miscellaneous Remarks, in a Report to the De- 

 partment of War. 1821. Am. Jour. Sci., 1S21, (1,) iii. 201-210; 

 Quart. Jour. Sci., 1822, xii. 422 - 423. 

 ■ On the Number, Value, and Position of the Copper Mines on the Southern 

 Shore of Lake Superior. Senate Papers, 2d Sess. 17th Cong., 1822, 

 Doc. 5, 33 pp. 



Notice of a Recently Discovered Copper Mine on Lake Superior, with several 

 other Localities of Minerals. Am. Jour. Sci., 1824, (1,) vii. 43-49. 



Narrative of an Expedition through the Upper Mississippi to Itasca Lake, tlie 

 Actual Source of this River. New York, 1834, 307 pp. with map. Con- 

 tains a Report by Douglass Houghton. 



Localities of Minerals observed in the Northwest in 1831 and 1832. Dis- 

 covery of the Source of the Mississippi, pp. 157 - 159. New York, 1834.- 



On the Production of Sand Storms and Lacustrine Beds by Causes associated 

 with the North American Lakes. Proc. Brit. Assoc. Adv. Sci., 1842, xii. 

 Trans. Sections, 42-44; Am. Jour. Sci., 1843,.(1,) xliv. 368-370. 



A Memoir on the History and Physical Geography of Minnesota. Minn. Hist. 

 Coll., 1850-56, i. 108-132. • ' 



Summary Narrative of an Exploratory Expedition to the Sources of the 

 Mississippi River in 1820, resumed and completed by the Discovery of 

 its Origin in Itasca Lake in 1832, Philadelphia, 1854. Purports to con- 

 tain many of the original Reports to the War Department, and other 

 papers. 

 Selwyn, Alfred R. C. 



Notes of a Geological Reconnoissance from Lake Superior to Fort Garry. 

 Geol. Surv. of Canada, Rep. of Prog., Montreal, 1872-73, pp. 8-18. 



The Stratigraphy of the Quebec Group and the Older Crystalline Rocks of 

 Canada. Canadian Nat. and Geol., 1879, (2,) ix. 17 - 32 ; Geol. Surv. of 

 Canada, Rep. of Prog., 1877 - 78, A. 15 pp. 

 Shepard, Charles U. 



On the Copper and Silver of Kewenaw Point, Lake Superior. Proc. of the 

 Sixth Ann. Meet, of the Assoc, of Am. Geol. and Nat., New Haven, 1845, 

 GO, 61. 



Tautolile on the North Shore of Lake Superior. Am. Jour. Sci., 1847, (2,) 

 iv. 278. 



Shepherd, Forrest. 



Remarks on a Boulder Mass of Native Copper from the Soutliern Shore of 



Lake Superior. Am. Jour. Sci., 1847, (2,) iv. 115, 116. 

 Observations on the Drift, Furrows, Grooves, Scratches, and Polished Surfaces 

 of the Rocks of Lake Superior. Am. Jour. Sci., 1847, (2,) iv. 282, 283. 

 Spencer, Joseph William. 



Lake Superior. — On the Nipigon or Copper-bearing Rocks of Lake Superior, 

 with Notes on Copper Mining in that Region. Canadian Nat. and Geol., 

 1878, (2,) viii. 55-81. 



