INDEX. 



825 



action, 272 ; as a measure of time, 

 291. 



Eruptions, of Vesuvius, 86; JEtna, 

 87; Coseguina, 89; Kilauea, 90; 

 other volcanoes, 90. 



Eureka mining district, 124. 



Evolution, facts bearing on, 194 ; con- 

 sidered, 294 seq.; not atheistic, 206, 

 312; an all-embracing plan, 311. 



Faults in mountains, 269. 



Favosites, 181. 



Feldspar described, 38, 39 ; primitive, 



225. 



Fern vegetation in coal, 150, 244. 

 Fiery teon, 202. 



Finiteness of geological time, 84. 

 Fire damp, 141. 

 Firehole River, 81. 



Fire-mist, 205 ; primordial, 205, 214, 219. 

 Firn, 22, 272. 

 Fishes, in deep sea, 61 ; reign of, 72, 



178 ; fossil, 178 ; 183, 184, 236 ; lessons 



from, 240. 



Flint implements, 283. 

 Flood from glacier, 278. 

 Foci of earthquakes, 106. 

 Footprints in sandstone, 248. 

 Foot-wall in mining, 119. 

 Foraminitera, 199. 

 Forbes on Alpine glaciers, 28. 

 Formation, defined, 74 ; the oldest not 



sedimentary, 74. 

 Fossils, 67 ; speculations on, 68. 

 Frumento, Monte, on JEtn&, 88. 



Gangue in mining, 124. 



Ganocephala, 260. 



Ganoids, 230, 238 ; prophetic, 258, 259. 



Garden of the gods, 55. 



Gardiner's River, scenery of, 80. 



Gardiner, 3., on Niagara Falls, 291. 



Gar pikes, 240. 



Gas, geology of, 138, 141 seq; localities 

 of, 141, 143, 144 ; composition of, 147; 

 value of, 147; source of, 148, perma- 

 nency of, 148. 



Gasteropods, 189, 195. 



Geological history, table of, 75. 



Geology, where data of are found, 9, 10. 



Geyerite, 81. 



Geysers in National Park, 81 seq ; in 

 Iceland and New Zealand, 84; ex- 

 planation of, 84. 



Giantess geyser, 82. 



Gilbert, G. K., on laccoHtes, 95. 



Glacier defined, 23 ; movements of, 28, 

 28, 29. 



Glaciers continental, 270 seq.; inva- 

 sion of, 271 ; pressure of and conse- 

 quences, 275 ; examples of, 279. 



Glaciers of the Alps, description of, 

 24 ; movements of, 23, 28, 29 ; former 

 extension of, 29, 30. 



Globigerina ooze, 59 ; in chalk, 168. 



Gneiss, 39 ; syenitic, 39. 



Goniatites, 242. 



Gorge of Niagara, 277, 278 ; age of, 291. 



Gould, S. Baring, on geysers, 84. 



Grand crevasse, 25. 



Grand Plateau, 25. 



Granite described, 39; "Quincy," 89; 

 formation of, 231. 



Granulite, 39. 



Graptolites, 195. 



Great Plains, 243, 266, 267, 269, 277. 



Great Salt Lake, 269. 



Groups of strata, 74. 



Gypsum, geology of, 130. 



Hadrosaur, 251. 



Haematite, 126. 



Hall, James, on Niagara Falls, 291. 



Hanging wall in mining, 119. 



Hard waters, 34. 



Heat, internal, 84, 96 seq., 203 ; in ar- 

 tesian wells, 98 ; in mines, 98, 121 ; 

 in tunnels, 98; rate of increase of, 

 99, 100 ; theories of, 100 ; in deeper 

 rocks, 202. 



Hesperornis, 261. 



Hitchcock, C. H., on bowlders, 16, 17. 



Hornblende, 39. 



Horse in mining, 119. 



Horse type in geology, 256, 263. 



Hot Springs of National Park, 83. 



Hugi, on motion of glaciers, 30. 



Human relics, 283. 



Humphreys and Abbot on Missis- 

 sippi, 292. 



Hysenodon, 257. 



Hyposyenite, 39. 



Ice in the soil, 99; under lava, 100; 



erupted with lava, 100. 

 Iceland, geysers of, 84. 

 Ichthyornis, 261. 

 Ichthyosaur, 251, 260. 

 Iguanodon, 251. 

 Illinois flooded, 43. 



