628 



INDEX. 



Page. 



Atrypa reticularis 415, 416 



Attwood, G., analysis of ore 80 



Aurora mine 426 



Aurora South, ore from 420 



Austin, discovery of silver at 349 



mines, product of 382 



mines, quantitative relation 



of country rock to ore 361 



milling at 376 



Austin Company, at Mineral Hill . . 407 



Azoic Period 2 



Babylon Hill, altitude of 410 



Bacon, claim on Com stock 99 



Baker mine, near Georgetown, Col- 

 orado 599 



Baker mine, smelting works. 



606 



value of its ores 612 



BaUey, E. H. M., cited 426 



Baldwin, Leon, cited 262 



Baltimore and Colorado, claim on 



Burroughs lode 532 



Baltimore American, claim on Com- 



stock 99 



Baltimore tunnel 604 



Barrel amalgamation at Washoe. . . 266 



Basalt 18 



of the Virginia Eange 36 



Base Metal Eange, White Pine 440 



Bates lode, 521 



Bates-Hunter lode 521 



Battle Mountain district 317 



Bear Eiver, fossils from 462 



Beecher lode, Colorado 603 



Belcher mine, Comstock lode 43, 99 



operations of 186 



Belmont region, geological notes on 394 



advantages of 404 



Belmont mine 399 



mill 403 



Pago. 



Berlin Company, Cortez district. . . 407 



Bessler, Mr., cited 384 



Bessler Mount 343, 346 



Best and Belcher, claim on Comstock 99 



Big Creek Caiion mouth, altitude of 347 

 Big Creek Peak, in Toyabe Eange 



321,327,337 



altitude of 347 



Big Smoky vein 333 



Bindheimite, analysis of 299 



BirdsalPs mill at Dayton 262 



Black dike in Comstock lode 32 



Black Hawk City, Colorado 479 



mine on Bobtail lode . 503 

 mine on Gregory lode 



509, 513 



milling results 555 



Blanket table 258 



Blake, Professor W. P., cited 5 



Boalt, Hon. John A 350 



Bob, for transmitting motion in 



pumping machinery 128 



Bobtail lode, mining claims on. . . . 497 



costs of mining on 504 



product of 505 



Bobtail mine 499 



Bonanzas, arrangement of, in Com- 

 stock 51 



Bonner, Charles, cited 97, 247 



Boston and Colorado Smelting 



Works 677 



sampling ores 579 



roasting in heaps 580 



roasting of tailings 580 



crushing of ores and matt . . 581 



melting furnace 582 



quality of matt produced.. 583 



prices paid for ores 854 



