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INDEX. 505 
• Page. 
Happy Year mine, location and description of. 365 
Harlan H. claim, location of. 292 
Harman, John, development by. 430 
Harrington vein, character of. 396,397 
Harrison & Sevier, mine of. 288 
Harrison vein, location and description of. 427,429 
Hawkeye shaft, location and description of.. 283,433,437,442 
Henry Adney mine, view of. 350 
Hessite, description of. 116 
Hidden Treasure veins, location and description of. .. 157, 
173,434,437,440,441,443,444,445,448 
High Park lake beds, correlation of. 2,22 
Hillebrand, W. F., analyses by. 45, 
66,79,119,170,172,173,189,194 
on celestite. 125 
on emmonsite. 119 
on tellurides. 224,356 
Hills, Fred, manual of mines by. 144 
Hills, V. G., on Amia Lee ore chimney. 447 
on underground water_ 12,233,239,246,321,449,460,470 
Hillside claim, copper on. 115 
Hobo claim, location of. 330 
Holden, Edward, chlorination plant of. 139 
Homestake mine, location of. 148 
veins in. . 158 
Hoosier mine, description of. 286-287 
location of. 286 
production of. 152,286 
veins in, character of. 206,286 
workings of. 286 
Hoosier vein, character of. 287 
Hornblende, occurrence of ... 73-74,81,83,85,86,92,93,103,114 
Houghton, Richard, gold found by. 131 
Howard flat vein, location and description of. 156, 
161,163,1?7,179,182,210,309,312,324 
section of, figure showing. 161 
temperature on.,. 269 
Hiibnerite, description of. 127 
occurrence of. 4,114,169,174 
Hull City, placers at. 152 
Hull City mine, description of. 412-415 
gasm. 253,260 
geology of. 412 
location of. 5,408,412 
minerals in. 122 
ore of.. 170,213,413-415 
oxidation in. 198 
production of.-.. 149,412 
rocks in. 34,412 
section ot figure showing. 414 
veins in. 158,159,253,254,413,413,424 
water level in, change in, figure showing. 242. 
workings in. 412 
map showing. 413 
Hull City Placer mine, water level in. 234,240,245,246 
water level in, change in, figure showing. 242 
Humboldt prospect, location and description of. 287 
minerals on. 125 
Hydrocarbons, presence of, in vein-forming water. 221 
Hydrogen sulphide, presence of, in vein-forming water. 222 
Hydrometamorphism, alteration due to. 184 
evidence of. 196 
process of. 185 
See also Metasomatism; Alteration; Oxidation. 
I. 
Ida B. claim, location of. 314 
Ida May mine, description of. 347-348 
Page. 
Ida May mine, minerals in. 129 
ore of. 211,348 
prod uction of. 347 
Iddingsite, occurrence of. 96,192 
Igneous rocks, character of. 1 
description of. 3 
divisions of. 101 
occurrence of. 1-2 
petrology of. 3,101-113 
See also Volcanic rocks. 
Ilsemanite, description of. 123-124 
occurrence of... 114 
Independence, mines near. 5 
rocks near. 32 
view of. 362 
Independence Consolidated Mining Company, mine of. 412 
Independence mine. See Stratton’s Independence 
mine. 
Independence dike, location and description of. 458,460 
Independence veins, location and description of. 159, 
160,164,206,440,452-453,456, 461-462,463,464 
Ingham claim, location of. 314 
workings on. 315,317 
Ingham vein, location and description of. 318,320-321 
Intermediate vein. See Cobb vein. 
International vein, location of. 304 
Intrusive rocks, occurrence of. 32-36 
See also Igneous rocks; Dikes; etc. 
Iron, presence of, in vein-forming water. 222 
Ironclad Hill, mines on. 285,288-290 
rocks on. 147,283 
Ironclad mine, geology of. 29,286,288 
location of. 148,285 
minerals in. 121,122,125,129,183 
oxidation in. 197 
production of. 285 
veins of. 286 
workings of. 286 
Iron Mountain, dike on. 102 
Iron Mountain Mining and Milling Company, mines of. 280 
Iron ocher, occurrence of. 285 
Iron vein, location of. 294 
Isabella dike, location and character of. 381,383,396-397 
Isabella lode system, location of. 387 
mines on. 387-393 
Isabella mine, description of. 389-393 
dike in. 390 
analysis of. '93 
gas in. 4 . 260 
geology of. 389 
location of. 5 
metasomatism in. 195 
minerals in. 121,122,188 
ore of. 170,206,209,213,391-393 
oxidation in. 198,391 
production of. 149,389 
rocks in.29,30,34 
veins of, character of. 156, 
159,164,166,206,212,387,390-392,393-395 
figures showing. 390 
map showing. 388 
water level in.. 197,198,234,240,245,246 
changes in, figure showing. 242 
workings of. 387,389 
Isabella Mines Company, mines of. 389 
Isabella trachydolerite, abundancy of. Ill 
analyses of. 93,104 
area covered by. 110 
