136 BULLETIX OF THE 



Stamp Mills of Lake Superior. Trans. Am. Inst. Min. Eng., ISZ-i, ii 

 20S-215. 



The Lake Superior Copper Rocks in Pennsylvania. Trans. Am. Inst. Min. 

 Eng., 1879, vii. 331-333, 336. 



See C. P. Williams. 

 Borie, Jules. 



* Notice sur le Lac Superieur et ses Mines de Cuivre de la Rive Americaine. 

 St. Etienne Bull. Soc. Industr., 1860, vi. 233-284; vii. 185-252; viii. 

 271, 272; Allgem. Berg. u. Hiitten. Zeitung, 1862, iv. 4i8-450, 457- 

 460, 469-471. 

 Bradley, Frank H. 



Oil a Geological Chart of the United States east of the Rocky Mountains, and 

 of Canada. Am. Jour. Sci., 1S76, (3,) xii. 286 - 291. 

 Bristol, T. W. 



See Jacob Houghton, Jr. 

 Brooks, T. B. 



Geological Survey of Michigan, -^-ith Maps, 1869-1873, i. ; Part I., Iron- 

 bearing Rocks, 319 pp. ; Part II., Copper-bearing Rocks, R. Pumpelly 

 and A. R. Marvine, 143 pp. ; Part III., Palseozoic Rocks, Charles Rom- 

 inger, 105 pp; ii. 298 pp., contains papers by Messrs. Brooks, Julien, 

 Wright, Jenney, and Tuttle. 



On the youngest Hurouian Rocks south of Lake Superior and the Age of the 

 Copper-bearing Series. Am. Jour. Sci., 1876, (3,) xi, 206-211. 



Classified List of Rocks observed in the Huronian Series, south of Lake Su- 

 perior, etc. Am. Jour. Sci., 1876, (3,) xii. 194-204. 



See T. C. Chamberlain. 

 Brooks, T. B., and R. Pumpelly. 



On the Age of the Copper-bearing Rocks of Lake Superior. Am. Jour. Sci., 

 1872, (3,) iii. 428-432. 

 Brown, A. J. 



The Forn\ation of Fissures and the Origin of their Mineral Contents. Trans. 

 Am. Inst. Min. Eng., 1874, ii. 215 - 219. 



Burt, William A., and Bela Hubbard. 



Reports of AVilliam A. Burt and Bela. Hubbard on tbe Geography, Topogra- 

 phy, and Geology of the U. S. Surveys of the Mineral Region of the South 

 Shore of Lake Superior for 1845, etc. In the " Mineral Region of Lake 

 Superior," by J. Houghton, Jr., and T. W. Bristol. Detroit, 1846. Sen- 

 ate Docs., 1st Sess. 29th Cong., 1845-46, vii. Doc. 357, 29 pp.; 1st 

 Sess. 31st Cong., 1849-50, iii. 803-842. 



Geology and Topography of the District south of Lake Superior, 1846. Sen- 

 ate Docs., 1st Sess. 31st Cong., 1849-50, iii. 842-932. 



See Charles T. Jackson, and Jacob Houghton, Jr. 



Cabot, J. Elliot. 

 See Luuis Airassiz. 



