498 
INDEX 
Page. 
Anehoria-Leland mine, geology of. 293 
history of. 292 
location of. 5,148,291 
minerals in. 116 
ore of. 294-297 
production of. 148,292 
veins of. 157,165,294 
sections of, figure showing. 295 
water level in. 241,297 
change in, figure showing. 242 
workings in. 292-293 
plan showing. 295 
Anehoria-Leland Mining and Milling Company, mines 
of... 291-292,298 
Andesite, discussion of. 20 
occurrence of...,. 1,2,19 
Ankerite, occurrence of. 273 
Anna Lee dike, location and description of.. 439,440 
Anna Lee mine, chimney of. 447-448 
chimney of, stereogram of.. 447 
dikes in. 36,93,439,448 
minerals in. 121 
workings of. 433,437 
Anna shaft, location of. 426 
Anna spur vein, character of. 429 
Anorthite, description of. 127 
occurrence of. 81,114 
Anorthosite, description of. 55 
occurrence of. 20 
Antimony, occurrence of. 225 
value of. 170 
Apatite, description of. 126 
occurrence of. 49,52,54,55,64, 
67,74,76,78,81,83,86,88,93,103,114.193,194,340,474 
Apex claim, location of. 478 
Apex dike, location of. 480 
Apex vein, figure showing. 162 
location and description of. 158,159,164,478 
Appie Ellen claim, location of. 331 
workings of. 96 
Arapahoe claim, location and description of. 288 
Arcadia shaft, location and description of. 276 
Arcadia shoot, location and description of. 279 
Arequa, mines at. 358 
Arequa Gulch, placers in. 152 
prospects in. 150 
rocks in. 33 
Arfvedsonite, occurrence of. 114 
Argali, Philip, on Moose mine. 343 
Arsenopyiite, description of. 122 
occurrence of. 169 
Augite, occurrence of. 67,81,83,92,93,103,114 
August Flower claim, location of. 330 
Australia tunnel, rocks in. 350,354 
Aztec shaft, breccia contact in. 30 
B. 
Barite, occurrence of. 
B,aryta, occurrence of. 
Basalt, occurrence of. 
See also Dikes, basic. 
Basalt vein, location and description 
Basement rocks, character of. 
Battle Mountain, location of. 
minerals in. 
mines on. 
production of. 
view of. 
4,114,124,174,175,182 
. 220 
of. 382 
. 19-20 
. 430 
. 123 
. 5,430-496 
. 135 
. 34 
Page. 
Battle Mountain, mines on, workings of, plan showing 26 
rocks on. 21,32,33,57,70,78,83-84,430 
Battle Mountain tunnel, location of. 478 
Bayard Mining and Lease Company. 369 
Beacon claim, location of. 358 
Beacon Hill, drainage of. 9,235,251 
drainage of, figure showing. 250 
mines on. 5,148,349-361, 496, 
production of. 135 
view of. 350 
phonolite plug of. 34,349,354 
rocks of. 34,57,349,496 
section across, figure showing. 351 
structure of. 2 
view of. 350 
Beacon Hill mine, oxidation in. 198 
Beaver Creek, placers on. 152 
Becker, G. F., on deposition. 229 
Bennet and Myers, ranch of. 130 
Bernard Creek, prospects on. 151,280 
Bertha B. claim, location of. 341 
workings of. 342 
minerals in. 126 
Bibliography of district. 15-17 
Big Bull Mountain, mines of. 495 
rocks of. 29,34,70,97,495 
view of. 34 
Big Twenty Mining Company, development by. 496 
Biotite, description of. 128 
occurrence of. 44. 46,49,50,52,56,64,73-74,77,78,85,86, 
89,92,95,96,100,103,114,175,193,194,436 
Biotite-feldspar, vein of. 183 
Biotite trachyte, abundancy of. Ill 
analysis of. 104 
area covered by. 110 
See also Latite-phonolite. 
Black Diamond mine, location of. 477 
production of. 151 
Black Diamond vein, character of. 453 
Black vein. See Work vein. 
Block 7 mine, production of. 386 
Block 8 mine, description of. 384 
dikes of. 36,91,95,98,384-385 
ore of. 385 
rock of. 384 
analysis of. 96 
workings of. 384 
Block 10 mine, location and description of. 386 
Blue Bell tunnel, drainage by. 234,235 
Blue Bell vein, minerals in. 121 
Blue Bird Gold Mining and Milling Company,mine of. 372 
Blue Bird mine, dikes in. 91 
gas in. 261 
location of. 5,149,372 
minerals in. 116,120,121,122,176,182,372-373 
ore of. 171,205,372-373 
oxidation in. 203 
production of. 372 
rocks in. 33 
silver in. 203,372 
veins of, character of. 163,173,177,179,203,372-373 
section of, figure showing. 163 
structure of, figure showing. 163 
water level in. 240,245 
change in, figure showing. 242 
Blue Bird vein, location and description of. 163, 
173,203,371-373 
Blue Hill, mines on. 5 
