756 



INDEX. 



D. 



Daily output of Leadville mines (Ho 



Dana, Prof. J. D., cited 283,548 



Daubrie, A., cited 284,569 



DecUenite 411,016 



Decomposition in eruptive rocks 356 



Decrease of silver in depth 398 



Delaware River, chlorine in water of 552 



Delmonico gulch 193 



Democrat Mountain 1-4 



Deposition of ores, manner of 565 



Devonian in Rocky Mountains 56, 188 



Dikes 296 



influence of, on ore deposition 452 



interrupted 124, l->5, 179 



of Gray Porphyry. . . .447, 459, 461, 465, 460, 468, 470, 472, 



478, 481, 482, 483, 484, 490, 502, 511 



White Porphyry. .96, 97, 112, 114, 165, 178, 211, 324, 501 



DiUer, J.S 355,359 



DiOEITE 84,333 



augite.bearing 120 



hornblende 124 



in French gulch 192 



mica 125 



silverin 579.594 



Discussion, chemical, of Leadville furnaces 787 



OP GEOLOGICAL PHENOMENA 270 



smelting charges 659 



Displacement, amount of, in Mosquito Eau£e 39 



Disposition of smeltiug works, general 626 



works at Smelter A 669 



B 672 



C 674 



E 680 



F 681 



G 083 



H 685 



Distribution of gold in placer deposits 515 



intrusive rocks iu the Rocky Mount- 

 ains 305 



Leadville deposits 377 



porphyry bodies in Leadville region 206 



rich ore in Leadville deposits 494 



aedimentary formations in Mosquito 



Range 72 



Dolly Tarden mise 623 



Dolomites, relative solubility of 542 



used in smelting 643 



DOLOMiTic sediments discussed 276 



Dome fault 386 



MINE :. 389 



KIDGE 246 



the ■ 190,191,192 



DOUULE-DECKEB MINE 408 



Dkusy cavities in Ke vadite 347 



Drying of the fuhnace 064 



Dudley, Lincoln Porphyry near town of 120 



Dugan quarry 187 



dolomite analyzed 643 



Dust chamber at Smelter A 671 



Page. 



Dust chamber at Smelter H 088 



and ventilation at Smelter G 085 



Dutton, Capt. C. E., cited 359, 360, 361, 362 



Dyer Mountain 150,212 



fault 212 



Dynamic movements in Mosquito Range 32, 34 



E. 



Eagle River Porphyry SO, 188, 193, 330, 591 



Eakins, L. G., analyses by 325, 590 



East Abkaksas Valley 190 



Ball Mountain 213 



Leadville 153, 157 



Eddy & James' Sampling Works 629 



Eilers, A., cited 710 



El Capitan Creek 189 



mine 534 



Elgin Smelter 025, 626, 643, 646, 693, 694, 695, 698, 708, 711 , 



723, 725 



El More coke 041 



Embolite, analysis of 548 



Emmet fault 250, 386 



Empire GULCH isi 



KHYOLITE 351 



Hill 176 



Endlich, F. M., cited 56 



English gulch 191,192,200 



Epidote, as alteration product 330, 34 1 , 357 



Erosion, in Mosquito Range, general 40 



glacial 29,41, 120 



Eruptive formations 74,292 



rocks, capability of absorbing sediment- 

 ary rocks 308 



complete analyses of 358, 589 



their influence on structural forms. 26 



why intrusive and not surface flow.s - 300* 



Eureka, Kevada 15, 63 



EVAXS amphithe.\tek ... 214 



E\'ENiNG Star mine 433 



Expenses of smelting per 24 hours 668 



F. 



Fairplay 106,157 



Fasny Barrett mine 528 



Fault : 



Adelaide 243,402 



Ball Mountain 215 



Breece 236 



California 385 



Carbonate 248,410 



Colorado Prince 224 



Connection with folds 284 



Curving of beds adjoining a 140, 178, 280 



Dome 380 



Dyer Mountain 212 



Emmet 250,380 



Hade of 287 



Iowa 22 1 



IBON 244,384,402 



London 136,286,532,5.13 



Mike 180,226 



MomiugStar 411,438,441 



Mosquito 181,184,198,211,285 



Pendery 411.428 



