INDEX. 395 



Hall, Sir James, on the convolutions of slate, 340. 

 Happisborough, the inclined deposits at, 260. 

 Hartz Mountains, the granite of the, 33. 



, the metamorphic greywacke of, 324?. 



Hawkins, Mr., on the elvans of Polgooth, 189. 



Heaves of veins, the nature of, 182. 



Helford, the conglomerate of, 260. 297. 



Henslowe, Professor, on Anglesea, 302. 



Kenwood, Mr., on the heaves and throws of veins, 183. 



Hibbert, Dr., on the basin of Neuwied, 289. 



Hornblendic rocks, primary, of Cornwall, 43. 



in gneiss of the Western Isles, 69. 



Huel Jewel mine, the lode of, curved in length and depth, 181. 



Virgin mine, the brecciated lode of, 116. 



Hugi on the altered rocks of the Alps, 326. 



Hutton, the prevailing theory a modification of that of, 217. 



Hypogene rocks of Lyell, 224. 



I.&J. 



Jameson, Professor, on the structure of sandstone, 240. 



, on rock concretions, 254. 



Igneous rocks, the formation of, 213. 



, division of, into three classes, 214. 



Intersection of veins at Mousehole, 153. 



Johnston, Mr., on the changes in the level of the Baltic, 271. 



lona, passage of granite into slate at, 139. 



Ireland, the granite of the eastern part of, 28. 



, the primary schists of, 60. 



, structure of the granite of, 100. 



, altered strata next trap in, 302. 



Junction of granite and slate, 126. 

 , structure of rocks at the, 134. 



-, composition of, 137. 



Jungfrau, the union of the gneiss and limestone of the, 327. 



K. 



Killas next granite, the nature of the, 38. 

 Kinnoul, slate veins in the trap of, 352. 



L. 



Land, elevations of the, above the sea level, 272. 

 Layers of rock, diagonal arrangement of the, 238. 

 Limestone, talcose, in Cornwall, 47. 



, masses of, in gneiss, 71. 



, traversed by granite veins, 74. 



, junction with granite at Glen Tilt, 133. 



