482 



INDEX. 



Hypcrsthene rock or hyperite, 29, 31, 



279-281. SecNorites. 

 Hypozoic rocks, 245, 246. 



IPKNTIFICATION, chemical, 450. 

 Idocnise, hollow crystal of, 212. 

 Igneous rocks, theory of, 1, 3, 4, 6. See 



Exotic rocks. 

 Indigenous rocks, 33, 193. 

 Internal heat. See Heat, internal. 

 Interpenetration in chemistry, 428, 



450. 

 Inverted strata in the Alps, 334, 337; 



at Troy, New York, 407 ; at Quebec, 



413. 



lodate of calcium in sea-water, 237. 

 Iodine in mineral waters, 143; its rela- 

 tion to earthy sediments, 143, 226; 



in sea-water, 143, 226, 237 ; Sonstadt 



on, 237. 

 lolite or dichroite, 28 ; and aspasiolite, 



315; a feldspathide, 445. 

 Iron in mineral waters, 128, 142. 

 Iron ores, origin of, 10, 13, 22, 29-31, 



97, 227-229, 243; are evidences of 



life, 13, 302 ; relations of, to mineral 



coal, 229. See Bauxite. 

 Iron pyrites, origin of, 230, 232. 



LA BATE DU FEBVRE, waters of, 124. 



Labrador, geology of, 261, 393. 



Labradorite rocks, 29, 31, 33, 67, 278 - 

 281. See Norian rocks. 



Lake Elton, water of, 83. 



Lambertville, New Jersey, eruptive 

 rocks of, 186. 



Lanoraie, water of, 123. 



Laurent, A., on divisibility of formulas, 

 431 ; on isomorphism, 422 ; on chem- 

 ical types, 463. 



Laurentian series, 29, 30, 206; evi- 

 dences of life in, 302 ; eruptive rocks 

 of, 33 ; vein-stones of, 208 - 218. 



Laurentian, Upper. See Norian. 



Laurent ides, 243. 



Lauzon formation, 259, 401, 411, 413. 



LeConte, Joseph, on dynamic geology. 

 70-76. 



Leonhard on eruptive limestones, 218. 



Lersch, Hydro-Chemie, 122. 



Lesley, J. P., on mountains, 52, 53; on 

 an apparent discordance in lower 

 palaeozoic, 414. 



Lethaea Suecica, 366. 



Leucite, 67,101, 210. 



Isomorphism, 432, 440 ; its relations to Leymerie on the origin of limestones, 82. 



pseudomorphism, 315 ; polymeric, 

 291, 315, 318, 442. 



JACKSOX, CHARLES T., on the White 



Mountains, 241, 275. 

 Jade and jadeite, 445, 446. 

 Jollyte, 338. 

 Joly, water of, 126. 

 Jukes, J. B., on mountains, 74 ; on 



Cambrian and Silurian, 424. 



KANT on chemical union, 428, 450. 

 Kaolin, its formation, 10, 99-101, 445. 

 Keferstein, C., on igneous rocks and 



volcanoes, 16, 62, 71, 77; on Mont 



Blanc, 338. 

 King and Rowney on pseudomorphism, 



Levis formation, 259, 

 fauna, 411, 412, 415. 



401, 413; its 





Liassic fossils in veins, 203. 



Lignites, 176, 177, 181. 



Lime- salts in the modern ocean, 107, 

 117, 119; in ancient oceans, 2, 11, 41, 

 82, 108, 109, 117; in mineral waters, 

 138. See Carbonate of lime and 

 Carbonate of magnesia. 



Lime, silicates of, 31, 151, 152. 



Lime-soda feldspars, their possible ori- 

 gin, 97. See Feldspars, triclinic. 



Limestones, Laurentian, 206; of White 

 Mountain series, 196, 244; supposed 

 eruptive, 218 ; origin of, 82, 311 ; rela- 

 tions of, to organic life, 311. See 

 Carbonate of lime. 



Limonite, organic matter in, 98. 



Lingula, a phophatic shell, 312. 



Kinnekullo, Sweden, geology of, 367 

 Kolbe on chemical types, 459. 

 Kopp, H., on equivalent volumes, 433, 

 434. 



Lingula flags, 266, 370, 371, 374. 

 ids equivalent volume of, 436. 



Logan, W. E., on Upper Laurentian, 

 29, 279; on the Appalachians, 257; 

 on the White Mountains, 276 ; on 



