138 



BULLETIN OF TIIK 



Claypole, E. W. 



Ou the Pre-Glacial Geography of the Eegion of the Great Lakes. Canadian 



Kat. and Geol, 1878, (3,) viii. 187-206. 

 Pre-Glai .'I Eormation of the Beds of the Great American Lakes. Canadian 

 Na!. and GcoL, 1879, ix. 313-227. 



Clinton, De Witt. 



On Certain Plicnomena of the Great Lakes of America. Trans. Now York 



Lit. and Phil. Soe., ii., Part I. 1-33. 



Cordier, Louis. 



Note snr unc Masse de Cuivrc natif provenantdes Hives du Lae Suporieur, aiix 



iltats-Unis d'Amerique. Louis Cordier and Eliede Beaumont. Comptes 

 Eendus, 1819, xxviii. 161-163; Leonhard's Jahrbuch, 1819, p. 470. 



Courtis, W. M. 



The North Shore of Lake Superior as a Mineral-bearing District. Trans. 



Am. Inst. Min. Eng., 1877, v. 473-487. 



Credner, Hermann. 



Die GUederniig der eozoisehcn (vorsilurisehen) Eormationsgrnppe Nord- 



Amerikas. Zoits. Gesam. Naturwiss., Giebcl, 1SG8, xxxii. 353-405. 



Bcschreiburig einiger charaktcrisiischer Vorkomnien dcs gediegenen Kupfers 

 auf Keweenaw Point am Oberens See Nord-Amerika'i Leonhard's Jahr- 

 buch, 1869, 1-14. 



Die vorsihirischen Gebilde der " Obern Halblnsel von Michigan" in Nord- 



Amerika. Zeit. Dent. Geol Gesell., 1869, xxi. 516-554. 

 Gewaltige Kupfermassen am Lake Superior. Leonhard's Jahrbuch, 1870, 86. 

 Leber nordamerikanische Schieferporphjroide. Leonhard's Jahrbuch, 1870, 



970-984. 

 Elemcnte der Geologic. *lst ed. 1872, *2d ed. 1872, 3d ed. 1876, 699 pp., 



^4thcd. 1380. 



Crosby, William O. 



On a Possible Origin of Petrosillceous Eocks. Proc. Bost. Soc. Nat. Hist., 



1879, XX. 160-169. 

 Contributions to the Geology of Eastern Massachusetts, oucasional Papers 



of the Bost. Soc. Nat. Hist., 1880, iil. 280 pp., with map. 



■4 

 I 



Cunningham, Walter. 



Report of Walter Cunningham, late Mineral Agent on Lake Superior. Jan. 



8, 1845. Senate Docs., 23Lh Coug. 2d Sess., 1844-45, vii., No. 98, 

 5 pp. 



Dana, James D. 



System of Mineralogy. 1st cd., New Haven, 1837, 671 pp. ; 2d ed., New 

 York, 1844, 633 pp.; 3d ed.. New York, 1850, 711 pp.; 4th cd.. New 

 York, 1854, 853 pp. ; 5th cd., New York, 1868, 827 pp. 



Manual of Mineralogy. New Haven, 1857, 456 pp. 



lleview of Marcou's " Geology of North America." Am. Jour. Sci., (2,) 

 1858, xxvi. 323-333. 



