IXDEX. 



643 



Page. 



Scrohieularia 4G0 



Segregated Belcher, claim on Corn- 

 stock 99 



Semiuole tunnel at Unionvillo 314 



Sensenclerfer mine on Bobtail 503 



Separation 470 



Separators 200, 228 



Settlers 200, 228 



Shafts on Comstock lode 102, 103 



cost of sinking lOG 



.Shaft-timbering on Comstock 103 



Shafts on Lander Hill 300 



cost of sinking 361 



Sheaves, in hoisting machinery 139 



Sheba mine, Nevada 314 



Sheffield laboratory, Yale College 278, 299 



Sherman, E. A., cited 371 



Sherman shaft 371 



Sherman Mountain 598 



Shermantown, altitude of 411 



Shoe, for stamps 210 



Sides, mining claim 99 



Sierra Nevada mine 99, 100, 167 



gold-bearing 



quartz of 61 



Signals used in hoisting 142 



Silica in horses of the Comstock . . 90 



origin of, in lode 90, 91 



in normal propylite 90 



Silver, occurrence of 5 



Silver Mining Company at Union- 



ville 310, 312, 313 



Silver Bend district, geology of 393 



mines of 396 



Silver Bend lode 399 



Silver-bearing veins in Colorado . . . 486 



mining in Colorado 689 



ores, treatment of, at George- 

 town, Colorado 606 



Pago. 



Simpson, Colonel, cited . 459, 461, 462, 464 



Sinking shafts on Comstock 104 



cost of 106 



cost of, at Yankee 



Blade 375 



Skip, self-dumping 52G 



Slates of the Toyabc Eauge. : . 324 



Slimes in Washoe 196, 205 



producedin crushing . 250, 251, 253 



treatment of 252 



roasting of 256 



"working of, in i)ans 249, 250 



Smelting works at Black Hawk. . . 577 



at Georgetown 606 



Smith, J. Alden, cited 493 



Smith and Parxnelee 509, 519 



Smithia liennaliii 416 



Smoky Valley, Nevada 322 



Snake Eiver mines. Summit County . 490, 



617 

 Snowdrift, lode in Colorado 698 



Social and Steptoe Mining Com- 

 pany 447 



Solfataric action, in the Comstock. . 40 



Sonnenschmidt, cited 286 



South. American mine 369 



Speed in hoisting in Comstock 



mines 122 



Spirifer utalicnsis 415 



Spirifer engelmanni 415 



Sprague coal mine 468, 469 



Stamj) mills in Nevada 206 



foundations of 207 



mortars 207 



screens 208 



dies 208 



stems , 209 



beads 209 



