TABLE OF CONTENTS. XI 



Page. 

 Section II.— Continued 



Chap. VII. Chemistry of thermal waters, by A. C. Peale and Henry 



Leffmann 387 



Analyses of waters 3S7 



Calcareous or calcic waters 388 



Siliceous waters 390 



Fire-Hole Geyser Basin 390 



Gibbon Geyser Basin 391 



Table comparing waters from different geyser regions 393 



Table showing comparison of silica, &c., in thermal waters. 394 



Solid constituents of thermal waters 395 



Source of silica in thermal waters 395 



Source of the carbonates 397 



Sulphur and sulphuretted hydrogen 397 



Alumina 397 



Section III. Formations and deposits 398 



Chap. VIII. Physical features of deposit 398 



Amount of deposits 398 



Eapidity of deposition 399 



Cause of the deposits 400 



Appearance of the geynerites and mode of formation 401 



Mounds and cones or craters 403 



IX. Chemistry of deposits, by A. C. Peale and Henry Leffmann.. 405 



Trarertiue 405 



Siliceous sinter 406 



Viandite (a new variety of silica) 407 



Geyserites 408 



Upper Geyser Basin of Fire- Hole River 408 



Shoshone Geyser Basin 409 



Table of analyses of geyserites from Yellowstone National 



Park,&c 411 



Table of analyses of Iceland geyserites 413 



Table of analyses of New Zealand geyserites 413 



Pealite 413 



Table of analyses of pealites 415 



Aluminous deposits 415 



Table of analyses of mud deposits 416 



Section IV. Geysers 416 



Chap. X. Definition of geysers and theories 416 



Defini.tion 416 



Geyser theories 417 



XI. Peculiarities of geyser eruptions 423 



Differences between geysers 423 



Explanation of differences 423 



XII. Influences modifying geysers 424 



Effect of the atmosphere upon geysers 424 



Sympathetic or syuchi'onous action 425 



General conditions necessary for geysers 420 



bibilographical appendix. 



A. — Bibliography of the Yellowstone National Park 427 



B. — Biljliograjiliy of Iceland hot springs and geysers 432 



C. — Bibliogra])hy of the hot springs and geysers ot New Zealand 435 



D. — List of authorities for thermal springs of the United States 430 



