This page has been validated.
354
INDEX.
tions, 214. His survey of the Ural mountains, 336.
Muschelkalk of the Triassic system, i. 203.
N.
Nant Francon, purple slates of, i. 130.
Nant-y-Moen, mineral veins of, i. 149.
Natural History, definition of, i. 6. How distinguished from Geology, 6. Remarks on its study, ii. 319.
Natural sciences, their definition, i. 1. 6.
Nebulæ, Lord Rosse's observations respecting, i. 32.
Necker, M., his geological researches, ii. 88. On mineral veins, 159, et seq.
Neptunists and Plutonists, conflicting hypotheses of the, ii. 283. See Hutton.
Newcastle coalfield, its faults, i. 42. Cleavage of its igneous rocks, 68. Order of its coal beds, 168.
Newhaven, fossil remains of fish at, 87.
New York system, subdivisions of the rocks of, i. 143.
Nile, alluvial land of, i. 11. Herodotus's account of, 11. ii. 28. Its delta, how formed, ii. 27. Analysis of its deposits, 29.
Nitrogen, amount of, yielded by warm springs of the British Islands, ii. 255.
Nordstrand, history of, ii. 33.
North Sea, tertiary deposits in the, i. 262.
Northumberland, dip of stratified rocks in, i. 37.
Northwich, salt mines of, i. 63. 213.
Notre Dame des Ports, notice of, ii. 28.
O
Oak, proper soil for, ii. 327.
Oats, Captain, his experiments on the temperature of Tresavean mine, ii. 272.
Obsidian, analysis of, ii. 94.
Ocean, Atlantic, depth of, how ascertained, ii. 288.
Ocean, German, a survey of its organic contents recommended, ii. 36.
Ocean, Indian, submarine volcano in, ii. 232.
Ocean, Northern, its division at the commencement of the carboniferous era, i. 186. Ocean, Pacific, its waters a theatre of volcanic action, ii. 232. Its islands of volcanic origin, 232. Oeningen, fossil remains found in the quarries of, i. 92. ii. 47.
Oeynhausen, M., on the alterations effected by granite on argillaceous slaty rocks of Cornwall, ii. 108. 142.
Oolites of France and Germany, their resemblance to same group in England, i. 58. See Oolitic System.
Oolitic system, tables of deposits of, i. 55. 199. 204, et seq. Its composition, 214. Its structure, 217. Its divisional planes, 217. Series of strata of, 218. Its organic remains, 222. Geographical extent of the, 226. Its physical geography, 230. Its igneous rocks, 231. General review of the system, 231.
Oppel, Von, on the "Working of Veins," extract from, ii. 192. Ordnance Survey of England and Ireland, its services to geology, ii. 338.
Organic remains in hypozoic strata, i. 118. In Palaeozoic strata, 131. In Silurian strata, 140. In Devonian system, 156. In Carboniferous system, 170. In Permian system, 198. In Triassic system, 205. In Oolitic system, 222. In Cretaceous system. 237. In Cainozoic or Tertiary strata, 264. In Post-tertiary strata, 298, et seq. ii. 41, et seq.
Orleannois, animal remains found in the freshwater beds of, ii. 45.
Oronoko, forests of, i. 187.
Orteoceratites, of Loch Eribol, i. 118.
Ossiferous caves, i. 281. 303-316.
Ossiferous gravel, i. 281. 298-302.
Ott, M., his experiments on heat, ii. 267.
Ovid, his view of the earth's being an animal breathing out flame, ii. 219.
Owen, Professor, his discoveries in fossil zoology, i. 92. 96. 98. 106. ii. 42.
Oxygen, table of proportions of, contained in certain earths, &c., i. 24. Expansion of, when liberated from its compounds, 31.
Oysters and their habits, i. 337.
