INDEX. 



7b < 



Ptirk Range, propriety of name 23 



Parks of Colorado, geological structure of 22 



Pautlxg Quartzite 61,453 



Patent tuyeres at smelter F 682 



Peale, Dr. A. C, cited 306,342 



Peculiar accretions 730 



analyses of 730,731 



Peerless Mountain 159,182 



Pegmatite, age of 52 



defined 45 



Pendery fault 411, 428 



Penxstlvaxia Hill 135, 137, 138, 144 



Percy. Dr. John, cited 550,551,732-737 



Pevmo-Carboniferoas 69, 71 



Petrography, liy Whitman Cross 319 



Phillips, J. Arthur, cited 372 



Phyllite in Archean 51 



PigtaU gulch 234 



Pike's Peak excitement . 8 



Pilot fault 227 



Piney Creek 189 



River 7 



Placer deposits 515 



Plant AXD sjieltixg opebatioxs in general 659 



of individual smelt- 

 ers 669 



OF smelters, tabulated 639 



COST OF 626 



Plateau region 289 



Platte amphitheater 94 



glacier 106 



Plates, -where described or referred to : 



I (frontispiece) 210 



II 5,6,140 



III 28,149 



IV 52,94,124,200 



V 60,70,134,177 



TI 64,280,364 



VII 84-86,134,200,338,3.39 



VIII 87,346 



IX 91,94,95,107,117 



X 98,99 



XI 111,112 



XII 113,114 



XIII 128,527,528 



XIV 131, 132 



SV 37,147,148,152 



XVI 37,153,154 



XVII 153,158,160 



XVIII 37,164,165 



XIX 195,196 



XX 336-339 



XXI 330,354 



XXII 420,428,435,441,560 



XXm 666,670 



XXIV 671 



XXV 669-671 



XXVI 659 



XXVII 661 



XXVIII 642,673 



XXIX 664,676 



XXX 678 



XXXI 627,651,664,674,677 



XXXn 676,080 



XXXm 682 



Page. 

 Plates, where described or referred to — Continued. 



XXXIV 682 



XXSV 684 



XXXVI 685,739 



XXXVII 666,687,688 



XXXVm 635,688 



XXXIX 632 



XL 689 



XLI 630 



XLn .-.636,662,663 



XLIU 632-635 



XLIV 657, 666, 667, 677, 685, 686 



XLV 632,678,685,686,693 



Pogonip limestone, fauna of 62 



Porfhyrite 85,334 



analyses of 340, 358, 589 



defined 75,319 



dikes 124-126,134,160,200,201 



figured 64 



lead in 578, 591 



silver in 579. 594 



strontium in 577 



Porphyry bodies causing swelling out of strata 104. 156 



form of, indeterminable 564 



possible contents of 582 



Posepny, F., cited 371,374 



Post-glacial form.itioxs 72 



Pre-existing cavities, ores deposited in ? 371,373,374,378, 



304, 467, 563, 567 



Preliminary conditions of smelting 614 



Prime. Fred...jr 371 



Printer Boy Hill 231,510 



porphyry 234, 382, 513, 514, 516 



Processes of alteration of Leadville ores 550 



smelting, conclusions in regard to . . . 745 



Production, tables of, of metals 10,18 



Products ofsmelting 692 



Profits of smelting (per 24 hours) 609 



Properties OF slags 702 



Prospect Mountain 184,257 



Ridge 215 



Pseudomorphs of cerussite after galena 452 



Ptarmigan Peak, main crest north of ]82 



PULVERiz.ATiON of ores for assaying 632 



Pumpelly, R.. cited 372-375 



Pyrite, analysis of ^ 5.^6 



in "White Porphyry 495, 499 



original in Pyritiferous Porphyry 82, 327 



replacing fossils 177 



Pykitifekous Pokphvky 82, 222, 233, 235, 326 



areaof 582 



barium in 577,591 



distribution of, in Leadvillo 



region 208 



gold in 579, 594 



lead in . 578,591 



metallic contents of 580, 582, 583 



silver in 579,594 



Pyroxexe-uearing horxblexde-andesite 353 



Q- 



Quandary Peak 98 



quartziferous trachyte 352 



Quartz-mica diorite 84, 333 



porphyry 323 



