e N T E NTS. 
Page. 
Letter of transmittal 7 
Introduction, by C. W. Hayes 9 
Investigation of metalliferous ores, by S. F. Emmons 15 
Investigation of nonmetalliferous economic minerals, "by C. W. Hayes 29 
Gold and silver 31 
Progress report on Park City mining district, Utah, by J. M. Boutwell 31 
Placer gold mining in Alaska in 1902, by Alfred H. Brooks . , 41 
The Glenn Creek gold-mining district, Alaska, by Arthur J. Collier 49 
Gold and pyrite deposits of the Dahlonega district, Georgia, by Edwin 
C.Eckek _._ 57 
Neocene rivers of the Sierra Nevada, by Waldemar Lindgren (54 
Mineral deposits of the Bitterroot Range and the Clearwater Moun- 
tains, Montana, by Waldemar Lindgren 66 
The Chistochina gold field, Alaska, by Walter C. Mendenhall . 71 
Gold mining in central Washington, by George Otis Smith . . 76 
Ore deposits of Tonopah and neighboring districts, Nevada, by J. E. 
Spurr 81 
Gold mines of the Marysville district, Montana, by Walter Harvey 
Weed 88 
List of Survey publications on gold and silver 90 
Quicksilver, platinum, tin, tungsten, chromium, and nickel 92 
Stream tin in Alaska, by Alfred H. Brooks 92 
Platinum in copper ores in Wyoming, by S. F. Emm< >ns 94 
Tungsten mining at Trumbull, Conn., by W. H. Hobbs. 98 
Tin deposits at El Paso, Tex. , by Walter Harvey Weed . 99 
Tungsten ore in eastern Nevada, by F. B. Weeks 103 
List of Survey publications on quicksilver, platinum, tin, tungsten, 
chromium, and nickel . - 104 
Copper 1 05 
Ore deposits of Bingham , Utah, by J M. Boutwell 1 05 
Copper deposits of the Redding district, California, by J. S. Diller. 123 
Copper deposits at Clifton, Ariz. , by Waldemar Lindgren 1 33 
Copper deposits of the Mount Wrangell region, Alaska, by Walter C. 
Mendenhall and Frank C. Schrader 141 
Copper deposits of Bisbee, Ariz. , by F. L. Ransome 149 
Mineral resources of the Encampment copper region, Wyoming, by 
Arthur C. Spencer 158 
Reconnaissance examination of the copper deposits at Pearl, Colo., by 
Arthur C. Spencer 163 
Ore deposits at Butte, Mont. , by Walter Harvey Weed 170 
Copper deposits of the Appalachian States, by Walter Harvey Weed... 181 
List of publications on copper _ 186 
