758 



INDEX. 



Fryer Hill, ore discovered on 



Fuels asd fluxes 



annual consumption of, by smelters. 



used in assaying 



Fulgurite on ilount Liucoln 



FUSIES FBOM BaETLETT KILTER 



FURXACES at Smelter A 



B . 



general description of 659 



G. 



Gage, Hagaman & Go's smelter 625, 626, 693, 694, 693, 



698, 708, 725, 731 



Galena richer than cernssite .^ 452 



Gangue, estimatiox of 635 



Garnet in porphyrite 360 



Geikie, Prof. A , cited 309, 310, 313, 372, 373, 374, 375 



Gelatinous silica in ore deposits 407 



Gemixi Peaks 149 



Genesis of Leadahlle deposits 538 



ore deposits. Le Conte on the 575 



Genetic divisions of eruptive roclis 320 



Geological history of the Mosquito Range 30 



horizons peculiar to ore deposits 540 



structure of Carbonate Hill 409 



FryerHill 445 



Iron Hill 381 



North Iron Hill 401 



Gilbert, G.K., cited 296,305,306,359 



Gillespie & Ballou's Sampling 'Works 629 



Glacial deposits in Mosquito Range 93 



erosion, amount of 127 



influence on topography 29 



ill Mosquito and Buckskin gulches . 126 



Mosquito Range 41 



formatioss in Mosquito Range 92 



Gneiss 48 



age of 52,277 



Gold, amount taken from California gulch 9 



ASSAYS 635 



deposits 513 



first discovery of, in this region 8, 9 



in eruptive rocks 679, 594 



galena 514,545 



placer deposits 515 



method of determination of, in eruptive rocks . 595 



GhahamPark 250 



Granite 46 



age of 52,277 



Creek 175 



lead in 578, 591 



Grant,J.B 626 



Grant smelter 625, 626, 641, 643, 644, 646, 693, 694, 695, 



698, 699, 700, 701, 708, 711, 717, 725 



Granular, term defined 319 



Gray Porphyry 80,330,382,447 



analysis of 332,358,589 



distribution of, in Leadville region . 207 



in dikes 230, 447, 459, 401, 463, 46.i, 



466,468,470,472,478,481, 

 482. 483, 484, 490, 502, 511 



Gray porphyry, lead in 



silver in 



strontiam in 



Great Basin region 



Green Mountain 



Green Porphyry 83, 97, 117, 132, 



silver in 



Grimm, Dr. Job., cited 369,370, 



Groddeck, Dr. A. von, cited 370, 



Gunnison region, intrusive bodies in the 



Gnyard, Antony 



578 

 290 

 222, 507 

 231, 343 

 579, 594 

 371. .375 

 371, 375 

 306 

 is, 613 



Hadelberg. cited i 



Hade of faults ; 



Hague, Arnold, cited 63, 305, ; 



Habn,H. Celled ; 



Hardman. J. E., cited 645,658,098,' 



Hare. R. B., cited : 



Harrison Reduction 'Works 625, 626, 643, 646, 6 



694, 695, 698, 706, ' 



Hayden Atlas of Colorado, referred to 56, 62, 106. 1 



193, 342, ; 



Reports, cited 3,4,23,53,70,: 



Hearth accretions 



Heinrich, Carl ( 



Hematite formed from pyrite * 



used as flux ( 



Henriett mine < 



Henry Mountains 296,; 



notes on rocks from ; 



Hibernia raxE t 



Higginbotham. Joseph f 



Highlaxd Chief jnxE ! 



Hobenburg. rhyolite from c 



Holmes, "W. H., cited : 



HoosiER Pass Ridge ] 



section 1 



Ridge ] 



Hornblende-diorite 84, £ 



Horseshoe gulch i 



north wall of 1 



The 1 



Horsetails 1 



Howland post-oflice 1 



Huantajayit £ 



Huber,H 



Hunt. T. Sterry, cited 2 



Huronian, in the Rocky Mountains 



Hyatt. A., cited '. 



Hypersthene-andesite 89,353,354,3 



analysis of 5 



barium and strontium in 5 



Iddings, J. P., cited 305,329, 



Hes, Dr. M. 'W., cited .411, 616, 646, 674, 699, 700, 701, 710, 



Indiana gulch 



Indium in ores 



smelting products 



Injection theory 



Internal structure of eruptive rocks 



Intrusive bodies, strata curving round 



force, amount of 



sheets 



Iodine, method of determination of. in limestone 



355, 356 

 726, 727 



