LIST OF ILLUSTRATIONS. 



!N"o. Page.. 



1. Bent quartzites near Ogden , 14 



2. Wedge of limestone, Ogden Canon 16 



3. Basalt tables, Snake Eiver basin 29 



4. Basalt floor 29 



5. Reddish feldspathic granite. Wild Cat Canon 34 



6. Metamorphic strata, Black-tail Deer Creek 35 



7. Weathered granite, Madison Canon „ 39 



8. Gneisic strata on Elk Creek 43 



9. Gneisic strata with trap 59 



10. Cinnabar Mountain 60 



11. Devil's Slide, 61 



12. White Mountain Hot Springs, Gardiner's River, (chart) 64 



13. General view of overflow of Great Spring, Gardiner's River 66 



14. Liberty Cap - 67 



15. Extinct oblong geysers 68 



16. Chimney, Gardiner's River 69 



17. Dead Chimney, Gardiner's River 69 



18. Bathing pools. White Mountain hot springs 70 



19. Grotto in the glen. White Mountain hot springs 71 



20. Old Hot Spring, limestones shelving off by frost, &c 71 



21. Ideal section White Mountain hot springs „ 73 



22. Basalt at Low Falls, on Gardiner's River 74 



23. Devil's Den, Tower Creek 78 



24. Great Canon and Lower Falls of Yellowstone 85 



25. Sulphur and Mud Springs, Crater Hills, (chart) 88 



26. Sulphur and Mud Springs, Yellowstone River, (chart) 90 



27. Mud Caldron 91 



28. Grotto, Yellowstone River 92 



29. Giant's Caldron, Yellowstone River 93 



30. Mud Geyser 94 



31. Yellowstone Lake 95 



32. "TheAnna" 96 



33. Traveling in the Yellowstone country 99 



34. Section of large spring, Yellowstone Lake 100 



35. Mud Puff, Yellowstone River 100 



36. Mud Pot, Lower Fire Hole basin 103 



37. Crater of Thud Geyser, Lower Fire Hole 105 



38. Fountain Geyser, Lower Fire Hole 106 



39. Mud Puff, Lower Fire Hole 107 



40. Overflow down ravine from Steady Geyser lOS 



41. Architectural Fountain, Lower Geyser basin 100 



42. White Dome, Lower Geyser basin 110 



43. Steadv Geyser, Lower Fire Hole Ill 



44. Catfish Geyser .• 112 



45. Riverside Geyser, Upper Geyser basin 113 



46. Great Spring, Fire Hole River 115 



47. Grand Geyser 116 



48. Grand Geyser, Upper basin. Fire Hole River 117 



49. Crater Forms, Fire Hole basin 118 



50. The Bath Tab 118 



51. Punch Bowl No. 1 110 



52. Dental Cup ^ 119 



53. Punch Bowl No. 2 120 



54. Fungiform silica 121 



55. Spongiform or cauliflower silica 121 



56. Pearly silica 122 



57. Spongiform or cauliflower silica 122 



