LIST OF ILLUSTRATIONS. XV 



Facing page — 

 Plath XXIII. — Fig. 1. Crater of Giantess Geyser, Upper Basin of Fhe^ 



Hole Ei ver ! 



Fig. 2. Triuity and New Geysers, Upper Basin of Fire ( 



Hole River J 



XXIV. — ^Three Crater Spring and Geyser, Upper Fire Hole Basin.. 242 

 XXV. — Emerald Group, riglit bank of Iron Spring Creek, Upper 



Fire Hole Basin 244 



XXVI. — Emerald Group, left bank of Iron Spring Creek, Upper 



Fire Hole Basin 246 



XXVII. — Emerald Spring, Upper Fire Hole Basin 246 



XXVIII. —Black Sand Spring, Upper Fire Hole Basin 248 



XXIX. — View from tke Black Sand Spring, Upper Fire Hole Basin. 248 



XXX. — Craters of Union Geyserj Skoskone Basin 254 



XXXI. — Marble Clifl" Spring, Shoshone Basin 256 



XXXIL — Minute Man Geyser, Shoshone Basin 262 



XXXIIa. — Guard, Shield, and Minute Man, Shoshone Basin 204 



XXXIII. — Coral Spring, Shoshone Basin 280 



XXXIIIa. — Spring No. 14, South Group, Shoshone Basin 282 



XXXIV. — Crater of Brown Sponge Spring 284 



XXXV. — Velvet Sprin g, Shoshone Basin 286 



XXXVI. — Bronze Geyser, Shoshone Basin 288 



XXXVII. — Crater of Deluge Geyser, Heart Lake Basin 290 



XXXVIII. — Crater of Deluge Geyser, Heart Lake Basin 292 



XXXIX. — Spike Geyser, Heart Lake Basin 292 



XL. — Fissure Group, Heart Lake Basin 294 



XLa. — Fissure Springs, Heart Lake Basin 296 



XL&. — Heart Lake and Mount Sheridan, Rustic Group in dis- 

 tance 296' 



XLI. — Rustic Geyser, Heart Lake Basin 298 



XLIrt. — Columbia Spring, Rustic Group, Heart Lake Basin 300 



XLII. — Crater of Rustic Geyser, Heart Lake Basin 300 



XLIII. — Geyserites from Shoshone Basin and Upper Fire Hole Basin. 400 



XLIV. — Geyserites from Upper and Lower Fire Hole Basins 402 



XLV. — Tufas from Mammoth Hot Springs and geyserites from 



Fire Hole Basin 404 



FIGURES- 



FiG. 1. — Basins at Mammoth Hot Springs of Gardiner's River 68 



2. — Soda Butte on East Fork of Yellowstone River 86 



3.— Chart of springs at Crater Hills, 1871 94 



4. — Chart of springs at Mud Volcanoes, 1871 106 



5. — Hot spring cone on west arm of Yellowstone Lake 118 



6. — Giant Geyser in action 200 



7.— Grand Geyser, 1871 208 



8.— Grand Geyser in action, 1878 212 



9.— Crater of Old Faithful Geyser 222 



10.— Old Faithful Geyser in action, 1871 224 



11.— Beehive Geyser in action, 1872 236 



12. — Union Geyser in action, 1878 258 



13.— Eruption of Great Geyser and Stroekr in Iceland, aa seen by Hen- 

 derson in 1815 306 



14. — View of Cold Water Basins of TeTarata, at Rotomahana, New Zealand- 314 



15. — Otakapuarangi, Pink Terrace, at Rotomahana, Now Zoaland 316 



16. — Steamboat Sjjring on Bear River, near Soda Spriugs, in Idaho Territory. 324 



