TABLE OF CONTENTS. VII 



Page. 



Section II. — Continued. 



Chap. VII. — Continued. 



Description of Fissure Group 157 



Fifth or White Dome Group 159 



Table of White Dome Group 160 



Description of White Dome Group 162 



Sixth or River Group. .' 166 



Table of Eiver Group 167 



Description of Eiver Group 170 



Goose Lake Mud Springs 172 



Seventh Group or Fairy Falls Springs , 172 



Table of Fairy Falls Group 173 



Description of Fairy Falls Group 174 



Eighth or Sentinel Group 175 



Table of Sentinel Group 176 



Description of Sentinel Group 176 



Halfway Group or Egeria Springs 178 



Table of Egeria Simngs 179 



Description of Egeria Si)ring8 ISO 



Rabbit Branch Springs 180 



Recapitulation of Springs and Geysers of the Lower Geyser 



Basin 186 



VIII. Upper Geyser Basin of Fire Hole River 187 



Soda Geyser Group 188 



River Group 188 



Cascade Group 189 



GrottoGroup , 189 



Table of GrottoGroup 189 



DescriiJtion of Grotto Group 190 



Giant Group , 194 



Table of the Giant Group 195 



Rotind Spring Group 199 



Table of the Round Spring Group 199 



White Pyramid Group 200 



Table of the White Pyramid Group 200 



Description of the White Pyramid Group 200 



Castle Group 203 



Table of the Castle Group 204 



Description of the Castle Group 204 



Table of eruiitions of Castle Geyser 207 



GrandGroup 209 



Table of the Grand Group 209 



Description of the Grand Group 211 



Old Faithful Group 219 



Table of Old Faithful Group 220 



Description of Old Faithful Group 220 



Table of observations of 1872 on Old Faithful Geyser 222 



Table of Comstock's observations 223 



Table of ol)servation8 on Old Faithful, 1878 225 



Table of comparison of observations on Old Faithful Geyser. 229 



Upper Springs 1 1 229 



The Giantess Group 230 



Table of Giantess Group 230 



Description of Giantess Group 232 



