INDEX. 



325 



Freezing, the principle of, 225. 



Freezing, effects of, on rocks and soils, 

 217. 



Fremy, M., on the chemical composi- 

 tion of coal, 153. 



Frost, geological effects of, 39. 



Frosts, from night radiation, 225. 



Future, its character and arrangements, 

 309-322. 



Future of the earth, man's influence 

 on, 320. 



Geology, economic importance of the 

 study, 32. 



Geology, relation of, to physical geo- 

 graphy, 27. 



Geology, scientific advantages .of the 

 study, 32. 



Glacial epoch, its different stages, 247. 



Glacial epoch, its geographical limits, 



Glacial epoch, theories and hypotheses, 

 243. 



Glacial groovings and striations, 235. 



GLACIAL OR ICE-EPOCH, THE, 231-248. 



Glacier motion, description of, by 

 Forbes, 221. 



Glaciers, formation and effects of, 219. 



Glyptodon, tertiary mammal, 207. 



Gold-drifts in creeks and gullies, 252. 



Granitic rocks, summary of, 62. 



Graptolites of the Silurian system, 95. 



Ground-ice, nature and effects of, 226. 



Guano deposits, their age and magni- 

 tude, 265. 



Hail, nature and formation of, 215. 

 Haughton, Professor, quoted, 208. 

 Heat, metamorphic effects of, 73. 

 Heer, Professor, on current flora of 



Europe, 271. 

 Historic and pre-historic formations, 



269. 



Hoar-frost, production of, 215. 

 Holoptychius, fish of old red sand- 

 stone, 138. 



- Hot springs in connection with volcan- 

 oes, 55. 



Hull's ' Coal-fields of GreatBritain,' 174. 

 Human and pre-human formations, 269. 

 Human remains and implements in 



Europe, 278. 

 Humboldt, on relative ages of rocks, 



24. 

 Button, Dr, on our knowledge of the 



future, 309. 



Hutton, Dr, quoted, 35. 

 Hysenodon, tertiary carnivore, 210. 

 Hypozoic rocks, definition of, 99. 



Ice, preservative effects of, 229. 



Icebergs, their formation and magni- 

 tude, 222. 



Ice-caverns,Mr Browne's account of ,223. 



Ichthyosaurus, secondary reptile, 195. 



Igneous agencies, geological results of, 

 45. 



Igneous phenomena of carboniferous 

 era, 165. 



Igneous rocks, volcanic, trappean, and 

 granitic, 62. 



Industrial importance of geology, 32. 



Infusorial or microphytal earths, 211. 



Inorganic and organic, difference be- 

 tween, 295. 



Xj Interior of the globe, supposed nature 

 of, 18. 



Intermediate forms of the tertiary epoch, 

 208. 



Iron, bronze, and stone ages, relative 

 antiquities, 279. 



Iron, its applications and importance, 

 ISO. 



Ironstones of the coal formation, 180. 



Ice, formation and nature of, 214. 

 Ice, general functions of, 229. 

 Ice in the atmosphere, 215. 



ICE, ITS FORMS AND FUNCTIONS, 213-230. 



Ice on land, 216. 

 Ice on water, 225. 



Jukes, Professor, quoted, 209. 

 Kjokken-modding of Denmark, &c., 283 



Labyrinthodon, character of, 195. 

 Lacustrine formations of current era, 

 253. 



Lake-dwellings of Europe, 254. 



Lake-dwellings of Europe, apparent age 

 of, 282. 



Land and water of the future, 311. 



Landes de Bourdeaux, origin of, 260. 



Laurentian system, its rocks and fos- 

 sils, 87. 



Lava-cones, general slope of, 52. 



Lava discharges, magnitude of, 268. 



Law of progression, incessant operation 

 of, 319, 321. 



Levels of England, their formation, 256. 



Life, as a branch of natural science, 306. 



Life, first traces of, 97. 



Life, future distributions of, 314. 



Life, its forms and functions, 297. 



Life, its grades and arrangements, 298. 



Life, its origin and first appearance, 294. 



Life, its progressive ascent in time, 300. 



Life, its relations and physical condi- 

 tions, 296. 



Lignites of Austria, their value, 148. 



Lignites or brown coals, nature of, 147. 

 ~-^4 Limestone, its applications and import- 

 ance, 181. 



Limestones of the carboniferous sys- 

 tem, 161. 



Links or sand-drifts of British shores, 

 259 



Littoral concrete, nature and origin of 

 71. 



Lyell on tertiary formations, 203. 



Lyell's, Sir Charles, description of 

 Richmond coal, 149. 



