310 



INDEX. 



Hall, Capt. B., on dikes in Madeira, 103. 



, on granite veins, 125. 



Hamites spiniger, 192. 



Harwich, section in cliffs at, 178. 



Hastings Sand, 200. 208. 



Heat, consolidating effects of, 55. 



Hebrides, trap rocks of, 278. 



Heidelberg, granites of different as^es 

 at, 126. 



Helix plebeium, 46. 



Henry, experiments of, 146. 



Henslow, Prof, on changes caused by 

 a dike in Anglesea, 107. 



, on the Portland dirt-bed, 206. 



Ilerschel, Sir J., on slaty cleavage, 142. 



Hertfordshire puddingstone, 62. 



Hewett, Capt., on new channel in Yar- 

 mouth sands, 178. 



Hibbert, Dr., on fossils of the Coal, 245. 



High Teesdale, garnets in altered rock 

 at, 107. 



— — , intrusion of trap between strata 

 at, 110. 



Hildburghausen, fossil footsteps at, 238. 

 Hippurites, figures of, 196, 197. 

 Hoffman, on agency of subterranean 



gases, 147. 



, on metamorphic rocks, 295. 



Hoogly, R., analysis of water contained 



in mud of, 58. 

 Hornblende, 92. 102. 

 Hornblende-rock, 100. 135. 

 Hornblende-schist described, 133. 

 Hornstone, hornstone-porphyiy, 100. 

 Horner, Mr., on fossil fish in Coal stra- 

 ta, 245, 246. 



, on the Malvern hills, 288. 



Hubbard, Prof, on granite veins, 283. 

 Hugi, M., on alternation of gneiss and 



fossiliferous rocks in Alps, 298. 

 Humboldt cited, 251. 

 Hungary, trachyte of, 123. 

 Hutton, opinions of 153. 

 Hutton, Mr., on fossil coal plants, 247. 



252. 259. 

 Hyhodus reticulatus, 226. 

 Hypersthene, analysis of, 102. 

 Hypersthene rock, 101. 

 Hypogene, name proposed instead of 



primary for the crystalline rocks, 24. 



, rocks described, 118. 134. 



, must be old before they reach the 



surface, 298, 299. 



, age of how determined, 282. 294. 



, uniformity of mineral character 



in, 300. 



, why less calcareous than the fos- 

 siliferous, 301. 



. See also Granite, Plutonic rocks, 



and Metamorphic rocks. 



Ice, transportation of erratic blocks by, 

 86, 87. 



, columnar structure of, 140. 



Ichthyodorulites, 226. 262, 

 Ichthyosaurus, 228. 



Iguanodon, 203. 211. 

 Inclined and vertical stratification, 64 

 Indus, recent changes in delta of, 208. 

 Infusoria in tripoli, &c., 39. 



, figures of, 40. 



Inkpen Beacon, 195. 

 Insects, fossil, 221, 222. 

 Inverted position of strata, how caused, 

 73. 



Ipswich, section near, 175. 

 Ireland, tertiary strata in, 172. 

 Ischia, tertiary strata in, 276. 

 Iselten Alp, curved strata of the, 74, 75. 

 Isle of Bourbon, eruptions in, 283. 

 Isle of Wight, tertiary strata of, 43. 180. 



, chalk needles oi', 195. 



Isomorphism, theory of, 94. 



Jackson, Col., on columnar structure in 



ice, 140. 

 Jointed structure of rocks, 138. 

 Jorullo, volcanic eruption of, 283. 

 Jungfrau, section on the, 298. 

 Jura, section of structure of the, 71. 

 , Oolite of the, 214. 218. 233. 



Kamler, R., land shells in delta of, 43. 



Kaolin, mineral composition of, 26. 



Kaup, Prof, on fossil footsteps, 239. 



Keilhau, Prof, on Greenstone dike, 106. 



, on granitic rocks of Norway, 128. 



130. 144. 289. 



Kello way rock, cementing of the parti- 

 cles of; by lime derived from shells, 51. 



Keuper sandstone, fossils of, 237. 



Kildonan castle, dike near, 104. 



Killas altered by granite, 145. 



Kimmeridge clay, 221. 234. 



Labradorite, 92. 102. 

 La Coupe d'Ayzac, columnar lava of, 

 111. 



Lakes, arrangement of deposits in, 16. 



Lamarck, his division of bivalve mol- 

 lusca, 44. jj 



Land, proofs of the elevation and sub- 

 sidence of, 61. 63. 



Lander, Mr., on delta of Niger, 210. 



Land's End, granite of 119. 121. 



Land shells, numerous in freshwater 

 formations, 43. 



, drifted by rivers, 43. 



, figures of genera most common 



in strata, 46. 



Lartet, M., on fossil ape, 180. 



Lateral movements, folding of strata 

 by, 68. 



Lava described, 91. 97. 



Lehman's division of rocks, 152- 



Leibnitz, theory of, 156. 



Lepidodendra, figures of, 250. 



Lepidotus figures of, 202. 225. 



Leucite, 102. 



Lias, mineral character of 224, 225. 



, fossils of,— shells, 224. 231,— fish, 



225 reptiles, 227 ;— plants, 232. 



