14 COPPER-BEARING ROCKS OF LAKE SUPERIOR. 
LITERATURE. 
The following list of works includes all of any importance that embrace 
references to the Keweenawan rocks by geologists who have examined them 
in the field. The arrangement is a chronologic one, so that any one wish- 
ing to examine the history of the subject may do so conveniently.’ 
1824. 
BIGsBY (JoHN J.). Notes on the Geography and Geology of Lake Superior. Quarterly 
Journal of Science and Arts, 182425, xviii, 1-34, 228-269. 
1829. 
BAYFIELD (H. W.). Outlines of the Geology of Lake Superior. Transactions of the 
Literary and Historical Society of Quebec, 1829, i, 1-43. 
1831. 
Hovucuron (Doveias). A Report on the Existence of Deposits of Copper in the 
Geological Basin of Lake Superior. November 14, 1831. In the Discovery 
of the Source of the Mississippi, by H. R. Schooleraft, 526-531. 
1839. 
HovcuTon (DouGuas). First Annual Report on the Geology of Michigan, 1838. 
Lanman’s History of Michigan, 1839, 347-366. 
Second Annual Report of the State Geologist. Senate Docs., Michigan, 1839, 
264-294, 
1840. 
Hoveuron (DouGLAs). Third Annual Report of the State Geologist, 1840. Senate 
Does., Michigan, 1840, 66-157. 
1841. 
HovuGuron (DouGLAS). Fourth Annual Report of the State Geologist. Joint Docs., 
Michigan, 1841, 472-607. 
1842. 
Hovucuron (DouGias). Fifth Annual Report of the State Geologist. Joint Docs., 
Michigan, 1842, 436-441. 
Metalliferous Veins of the Northern Peninsula of Michigan. American Journal 
of Science and Arts, 1841 (1), xli., 183-186. 
1For the names of some of the foreign works I am directly indebted to Wadsworth’s bibliography 
of Lake Superior geology, without which aid I might have overlooked them. Op. cit. pp. 133-157. 
