viii TABLE OF CONTENTS. 



PAGE 



district, 211; Eagle Co., 211; Summit Co., 211; Park, Chaf- 

 fee, Rio Grande, and Codejos counties, 212 ; Custer Co., 212-213 ; 

 Gilpin, Clear Creek, and Boulder counties, 214 199-215 



CHAPTER X. SILVER AND GOLD, CONTINUED. ROCKY MOUNTAIN RE- 

 GION, WYOMING, THE BLACK HILLS, MONTANA, AND IDAHO. 



Wyoming, 216 ; the Black Hills, 216-218 ; Montana, geology, 

 218; Madison, Beaverhead, and Jefferson counties, 219; Silver 

 Bow Co., 220-221 ; Deer Lodge and Lewis and Clarke counties, 

 221; MissoulaCo., 222; Idaho, geology, 222; Custer, Boise, Alturas, 

 and other counties, 223 216-223 



CHAPTER XI. -^-SILVER AND GOLD, CONTINUED. THE REGION OF THE 

 GREAT BASIN, IN UTAH, ARIZONA, AND NEVADA. 



Utah, geology, 224 ; Ontario and other mines, 225-226 ; Silver 

 Reef, 226-227 ; Arizona, geology, 227 ; northern counties and the 

 Silver King mine, 228 ; Tombstone, 229 ; Pima and Yuma counties, 

 229 ; Nevada, geology, 230 ; Lincoln Co., 230 ; Ney and White Pine 

 counties, 231 ; Lander and other counties, 232 ; the Comstock 

 Lode, 233-237 224-237 



CHAPTER XII. THE PACIFIC SLOPE. WASHINGTON, OREGON, AND 

 CALIFORNIA. 



Washington, geology, 238 ; mines, 239 ; Oregon, geology, 239 ; 

 gold quartz and placers, 240 ; Example 44a, Port Orford, 240 ; Cali- 

 fornia, geology, 241 ; Calico district, 242-243 ; Example 44, aurifer- 

 ous gravels, 243-248 ; river gravels, 243-245 ; high or deep gravels, 

 245-248 ; Example 45, gold quartz veins, 248-251 238-251 



CHAPTER XIII. GOLD ELSEWHERE IN THE UNITED STATES AND CAN- 

 ADA. 



Example 45a, Southern States, 252 ; Example 456, Ishpeming, 

 Mich., 253 ; Alaska, geology, 253-254 ; Example 46, Douglass Island, 

 254-255 ; Example 45c, Nova Scotia, 255 ; Example 45d, gold else- 

 where in Canada, 256 ; statistics, 256-257 252-257 



CHAPTER XIV. THE LESSER METALS. ALUMINIUM, ANTIMONY, AR- 

 SENIC, BISMUTH, CHROMIUM, MANGANESE. 



Aluminium, 258 ; antimony, 259-260 ; Example 47, including 

 California, Nevada, Arkansas, and New Brunswick, 259 ; Exam- 

 ple 48, Utah, Iron Co., 259-260 ; arsenic, 260 ; bismuth, 260-261 ; 

 chromium, 261 ; Example 49, chromite in serpentine, 261 ; man- 

 ganese, 262 ; Example 50, manganese ores in residual clay, 262-266 ; 

 statistics, 266 251-266 



CHAPTER XV. THE LESSER METALS, CONTINUED. MERCURY, NICKEL 

 AND COBALT, PLATINUM, TIN. 



Mercury, 267-269; Example 50, New Almaden, 267, 268; Exam- 



