758 



INDEX. 



Fryer Hill, ore discovered on 



FUELS AND FLUXES 



annual consumption of, by smelters. 



used in assaying 



Fulgurite on Mount Lincoln 



Fun KS FROM BAETI.ETT KILTER 



FURNACES at Smelter A 



B 



C 



D 



E 



F 



G ... 



Page". 

 13 

 641 

 638 

 633 

 111 

 717 

 670 

 673 

 676 

 679 

 681 

 682 

 684 

 687 

 659 



general description of 



G. 



Gage, Hagaman &. Co's smelter 625, 626, 693, 694, 69 >, 



698, 708, 725, 731 



Galena richer than cernssite 452 



GANOUE, ESTIMATION OF 635 



Garnet in porphyrite 360 



Geikie, Prof. A , cited 309, 310, 313, 372, 873, 374, 375 



Gelatinous silica in ore deposits 407 



GEMINI PEAKS 149 



GENESIS OF LEADVILLE DEPOSITS 539 



ore deposits, Le Conte on the 575 



Genetic divisions of eruptive rocks 320 



Geological history of the Mosquito Range 30 



horizons peculiar to ore deposits 540 



structure of Carbonate Hill 409 



FryerHill 445 



Iron Hill 331 



North Iron Hill 401 



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



Gillespte & Halloa's Sampling Works 629 



Glacial deposits in Mosquito Range 93 



erosion, amount of 127 



influence on topography 29 



in Mosquito and Buckskin gulches. 126 



Mosquito Range 41 



FORMATIONS in Mosquito Range 93 



GNEISS 4g 



ageof 12,277 



Gold, amount taken from California gulch 9 



ASSAYS 635 



DEPOSITS B13 



first discovery of, in this region 8,9 



in eruptive rocks 579, 594 



galena 514,545 i 



placer deposits 515 



method of determination of, in eruptive rocks. 595 



GBAHAMPABK 250 



GBANITE 46 



ageof 52,277 



Creek 175 



leadin 578,591 : 



Grant, ,T.B _ gog I 



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



698, 699, 700, 701, 708, 711, 717, 7L':> 



Granular, term denned 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, 4C.i, 



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

 482.483,484,490,502,51; '< 



Page 



Gray porphyry, lead in 578,591 



silverin 579,594 



strontium in 573 



Great Basin region 290 



Green Mountain 222 507 



Green Porphyry 83,97, 117, 132, 23l| 343 



silverin 579,594 



Grimm, Dr. Joh., cited 369,370,371,375 



j Groddeck, Dr. A. von, cited 370,371,375 



i Gnnnison region, intrusive bodies in the 306 



Guyard, Antony ii,613 



H. 



Hadelberg. cited 595 



i HADE OF FAULTS 287 



Hague, Arnold, cited 63,305,355 



Hahn, H. C., cited 554 



Hardman.J. E., cited 645,658,698,701 



Hare, R. B., cited 283 



Harrison Rednct ion Works 25, 626, 643, 646, 693. 



694,695,698,708,711 



Hayden Atlas of Colorado, referred to 56, 62, 106, 158, 



193, 342, 343 



Reports, cited 3,4,23,53,70,161 



HEARTH ACCRETIONS 725 



Heinrich, Carl gog 



Hematite formed from pyrite 499 



used as flux 54^ 



HEXKIETT MIXE 44,, 



Henry Mountains 296,303 



NOTES OX BOCKS FROM 359 



HiBEBXIA MIXK 4#2 



Higginbotliam, Joseph 5^4 



HIGHLAND CHIEF MINE 501 



Hohenburg, rhyolite from 347 



Holmes, W. H., cited 261 



HOOSIEB PASS RIDGE 100 



section 101 



RIDGE 103 



Hornblende-diorite 84333 



i HORSESHOE GULCH 153 



northwallof 155 



THE iao 



Horsetails 194 



Howland post-office 190 



Hnantajayit 554 



Huber.H . x 



Hunt, T. Sterrv, cited 279 



Huronian, in the Rocky Mountains 45 



Hyatt. A., cited 71 



Hypersthene-andeeite 89, 353, 354, 355 



analysis of 689 



barium and strontium in 577 



I. 



Idding,J. P., cited 305,329,355,356 



lies. Dr. M. W., cited -411, 616, 646, 674, 699, 700, 701, 710, 726, 727 



Indiana gulch 191 



Indium in ores 377,547 



smelting products 714 



Injection theory 570 



IHTEBXAL STRUCTURE of eruptive rocks 302 



Intrusive bodies, strata curving round 104,150 



force, amount of 298 



SHEETS 295 



Iodine, method of determination of, in limestone ... 597 



