632 



INDEX. 



Page. 



Oomstock mines : 



general method of 



exploitation 101 



deep sliaffcs of 102 



drainage of 102 



timbering of 115 



ventilation of 131 



low-grade ores of. 163 



review of 167 



future of 160 



assessments, pro- 

 ducts, and divi- 

 dends of.... 187,191 

 Comstock ores : 



mineralogical char- 

 acter of 273 



analysis of. . . 80, 89, 274 

 Comstock lode at Snake Eiver, Col- 

 orado 618 



Comstock lode at Snake River, Col- 

 orado, product of 623 



Concentrating machinery, Collom's 



machine 620 



Concentration by dry methods 616 



of ores about George- 

 town 613 



of tailings 258 



Confidence, claim on Comstock lode 99 



Conlee, claim on Burroughs lode. . . 552 

 Continuous percussion table, (Eittin- 



ger's) 569 



Consolidated, claim on Comstock. 40,99 

 Chloride Flat Mining 



Company... 430 



operations of , . 431 



cost of mining. . . 433, 435 



Copper, occurrence of 5 



in Battle Mountain district 319 



Page. 



Corbula 459, 460 



pyriformis 463 



Cord of ore, its equivalent in tons. 559 



Cordaites 417 



Cordillera system 4, 5 



Cord-wood, means of handling 162 



Cortez district 405 



Cost of chloridizing-roasting in Stet- 



efeldt furnace 272 



Cost of crushing ores in Colorado. . 555 



milling in Washoe 232, 233 



Ophir mil], Colo- 

 rado 535 



treating first-class ore at 



Washoe 268 



150, 158 

 . . . 109 



mining on Comstock . . 

 drifting on Comstock . 

 mining in Colorado 513, 517, 530, 



544 

 minmg in Colorado, in Oi)hir 



mine 535, 537 



mining in Colorado, in First 



National mine 538, 539 



mining in Colorado, in Black 



Hawk mine 517 



mining in Colorado, in Bob- 

 tail mine 504 



mining in Colorado, about 



Georgetown 594 



mining in Colorado, in Equa- 

 tor mine 001 



sinking shafts on Comstock 106 

 in Gould and 



Curry .... 107 



at Austin . . . 361 



ores of Comstock lode. . 147, 158 



timbering in Comstock mines 115 



Cotta, Yon, cited '. 24 



