

w-i 



/ 



UNITED STATES GEOLOGICAL EXPLORATIOxN OF THE FORTIETH PAR.VLLEL. 



CLARENCE KING, GEOLOGIST-IN-CIIARGE. 



MINING INDUSTRY 



BY 



JAMES D. HAGUE 



WITH GEOLOGICAL CONTRIBUTIONS 



BY 



CLARENCE KING. 



SUBMITTED TO THE CHIEF OF ENQINEEES AND PUBLISHED BY ORDER OF THE SECRETARY OF 



WAR UNDER AUTHORITY OF CONGRESS. 



ILLTJ3TKATED BY XXXVn PLATES AKD ACCOMPAimKa ATLAS. 



WASHINGTOIf. 

 GOVERNMENT FEINTING OFFICE 



1870. 



