... ._>-^-Mn^x 



136 



BULLETIN OF THE 



Stamp Mills of Lake Superior. Trans. Am. Tnst. Mhi. Eng., 1^7^, ii 



208-215. 

 Tlic Lake Superior Copper Rocks iti Pennsylvania. Trans. Am. Tnst. Min. 



Eng., 1879, vii. 33i-3;3;3, 3:30. 

 >SV C. p. Williams. 



Borie, Jules. 



* JS'oLiee sur Ic Lac Superieur ct scs Mines do Cuivrc do la Hive Amcricaine. 

 St. Etieuue Bull. Soc. ludusir., 1800, vk 233-284; vii. 185-252; viii. 

 271, 272; Ailgem. Berg. u. llilttcn. Zeituug, 18G2, iv. 118-450, 457- 

 4G0, 4i)'J-47i. 



Bradley, Frank H. 



Ou a Geological Chart of tlic United States east of the Uoeky Mountains, and 



of Canada. Am. Jour. Sek, 1870, (3,) xIL 280 -291. 



Bristol, T. W. 



iScc Jacob Houghton, Jr. 



Brooks, T. B. 



Geological Survey of Michigan, with Maps, 1809-1873, i. ; Part L, Iron- 

 bcaruig Rocks, 319 pp.; Part IL, Copper-bearing Hocks, 11. Pumpeily 

 and A. \i. Marvine, 143 pp.; Part 111., Palasozolc Rocks, Charles Rom- 

 iiiger, 105 pp ; ii. 208 pp,, contains papers by Messrs. Brooks, Julicn, 

 Wri'-'ht, Jeuncv, and Tuttle. 



On the youngest lluronian Rocks south of Lake Superior and the Age of Hie 

 Copper-b('ariiig Scries. Am. Jour. Sci., 1870, (3,) xi. 200 -211. 



Classified List of Rocks observed in iJie lluronian Series, south of Lake Su- 

 perior, etc. Am. Jour. ScI., 1870, (3,) xii. 194-204. 



jSre T. C. (Jhamberhun. 



Brooks, T. B., ajul R. Pumpeily. 



Ou the Ago of the Copper-bearing Rocks of Lake Superior. Am. Jour. Sci., 



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



Brown, A. J. 



The Formation 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 William A. Burt and IJela llubljard on the Geography, Topogra- 

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

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

 Superior," by -L Tlf)ughtoii, Jr., and T. W. Bristol. Detroit, 1840. Sen- 

 ate Docs., 1st Sess. 29lli Cong., 1815-40, vii. Doc. 357, 29 [)p. ; 1st 

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



Geology and Topography of tin; District south of Lake Superior, 184G. Sen- 

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



See Charles T. Jackson, aud Jacob 41oughton, Jr. 



Cabot, J. Elliot. 



/See Louis Agassiz, 



0^5:-% 



