484 



INDEX. 



Mont Cenis Tunnel, 334, 347. 



Montlosier, De, on mountains, 52, 74. 



Montreal, dolerite of, 186, 298. 



Moore, Charles, on liassic fossils in 

 veins, 204. 



Morlot, Von, on dolomite, 308. 



Mountains, origin of, 49, 61, 62, 73, 74; 

 synclinal structure of, 345. 



Mud-volcanoes, 8. 



Murchison, R. I., on geology of Scot- 

 land, 271; on Silurian rocks, 352, 

 355, 378-380; errors of his Silurian 

 sections, 358, 362, 380; on geology 

 of the Alps, 337. 



Murray, Alex., on geology of New 

 foundland, 406. 



NATROLITE and orthoclase associated, 

 6, 192, 206. 



Natron-lakes> 12, 85, 146, 158. 



Naumann, C. F., on metamorphism, 

 25, 293, 295, 322, 323; on envelop- Oke 

 inent, 292; on origin of crystalline 

 rocks, 294; on pseudomorphism, 292, 

 320, 322. 



Nebuhir hypothesis, 36, 38, 222. 



Neolite, 296. 



Neptunists and plutonists, 45. 



Nerepis, New Brunswick, granites of, 

 201. 



Nevada, silicious veins in, 204. 



Newberry, J. S., on cycles of sedimen- 

 tation, 241 ; on geology of Ohio, 416. 



New Brunswick, geology of, 276, 407- 

 409, 415. 



Newfoundland, geology of, 261, 275, 

 405-410. 



New Hampshire, geology of, 242, 281. 



Newport, Rhode Island, geology of, 249. 



New York, geological survey of, 387 - 

 389; system of rocks, 387, 389. 



Niagara limestone, 417, 418; of Chicago, 

 172. 



Nickel in rocks, 31, 32, 34, 243, 247, 

 269. 



Nickles, J., on nitrification, 472. 

 on geology of Scotland, 271. 



Nicolet, Quebec, water of, 126. 



Nitrates, reduction of, 94, 113, 472. 



Nitre, hollow crystals of, 212. 



Nitrification, theory of, 464, 470. 



Nitrite of ammonia, its formation, 471. 

 Nitrogen gas, a nitryl, 464, 470. 

 Nitrogen of volcanoes, 8 ; amount of, in 



rocks, 113. 



Norian rocks, 29, 31, 33, 278-282. 

 Norites, 31, 33, 279; olivine in, 31, 280. 

 Nova Scotia, geology of, 408, 409, 415. 

 Nucleus of the earth, 7, 39, 44, 56, 67, 



69-61, 64. 



OCEAX, primitive, 2, 11, 40, 41; palaeo- 

 zoic, 82, 104, 108, 109, 119, 137, 163; 

 evaporation of its waters, 76, 83, 92, 

 104, 107, 108, 310; metals in waters 

 of, 231, 237; bromine in, 142; iodine 

 in, 144, 226, 237 ; potash in, 135. See 

 Carbonate of soda and Carbonate of 

 lime. 



Ochre, formation of, 98, 228. See Iron 

 ores. 



Ohio, brines of, 120 ; geology of, 416. 



;n, miueralogical classification of, 

 454. 



Oleiferous limestone of Chicago, 172. 



Olivine, ia norites, 31, 280. See Chrys- 

 olite. 



Oneida conglomerate, 416. 



Onondaga formation, 155, 417, 418; the 

 oldest saliferous known, 119; min- 

 eral waters from, 163. 



Ontario, petroleum of, 168-171. 



Ophiolite. See Serpentine. 



Orbicula, a phosphatic shell, 312. 



Ore-deposits, 23, 233. 



Organic and inorganic bodies, 427, 453. 



Organic life, chemical relations of, 2, 

 13, 22, 42, 96, 144, 225, 226, 231, 302, 

 311, 312 ; evidences of, in crystalline 

 rocks, 13, 302; in aerolites, 302. 



Organic matters in waters, 94, 125, 152, 

 163; chemical relations of, 13, 22, 

 97-99. 



Orthoclase, 12, 101, 192, 206; produc- 

 tion of, 298, 299; formula of, 443. 

 See Feldspars, Granites and (jranitic 

 vein-stones. 



Orthophyre, 187, 243, 250, 282. 



Ottawa basin, geology of, 412. 



Ottawa River, water of, 84, 126 ; potash 

 in, 136; silica in, 150; silicate of lime 

 from, 152. 



