INDEX. 



479 



Dolerite, 3, 23, 284; stratiform struc- 

 ture in, 186. 



Dolomieu, decay of granite, 10. 



Dolomite, origin of, 81, 307 ; two classes 

 of, with and without gypsum, 87, 88, 

 309; fresh- water, 88; metalliferous, 

 88, 309; is not decomposed by gyp- 



carbonate of magnesia, 107 ; organic 

 remains in, 88, 92; artificial forma- 

 tion of, 90, 91, 307; produced by 

 evaporation in closed basins, 76, 85- 

 88, 92, 101, 310; relations of car- 

 bonic acid in the atmosphere to its 

 formation, 43, 308 ; supposed epigenic 

 origin of, 81, 92, 287, 307, 325 ; Cor- 

 dier on, 81 ; Von Morlot and Marig- 

 nac on, 308; Von Buch on, 81, 309 

 Haidinger on, 325. 



Donegal, Ireland, crystalline rocks of, 

 34, 272. 



Drops, Guthrie on, 10. 



Dualism in chemical theory, 428. 



Dublin, Ireland, granite veins of, 199. 



Ducktown, Tenn., copper veins of, 217 

 250. 



Dumas on chemical types, 462. 



Dumont on disturbed strata, 334. 



Durocher on igneous rocks, 3, 189, 190. 



Dynamical geology, some points in, 

 70. 



EARTH, compared to an organism, 236; 

 interior of, whether liquid or solid, 

 7, 16, 39, 44,56, 59, 60, 70, 71; its re- 

 lation to magnetism, 60. See Crust 

 of the earth. 



Eaton, Amos, classification of rocks, 

 241 ; on the rocks of Vermont, 241, 

 252. 



Ebelman, decay of silicious minerals, 

 100. 



Eichhorn, action of saline waters on 

 soils and aluminous double silicates, 

 95, 96. 



Elffiolite in granitic veins, 200. 



Elements, chemical, distribution of, 

 221; in other worlds, 36; possible 

 new ones in stars, 37. 



Elevation of continents, 15, 17, 53, 76. 



Elie de Beaumont on water in igneous 



rocks, 5, 190; on silicious deposits, 

 89, on granitic veins, 189; on ter- 

 restrial circulation, 225; on Alpine 

 geology, 332, 348. 



Emerald veins of New Grenada, 205. 



Emery, origin and occurrence of, 13, 

 98. 



sum, 106; with hydrate and hydro- Emmons, E., on rounded crystals, 212; 



on eruptive limestones, 218; on the 

 Green Mountains, 250; on serpen- 

 tine, 250; on the Taconic system, 

 251-253, 268, 388-390; on" Cam- 

 brian, 268; on hypersthene rock, 

 279; on recomposed rocks, 341; on 

 the geology of New York, 368. 



Endogenous rocks, 193, 196 - 199. 



Envelopment of minerals, 288-290, 

 314. 



Eophyton, 385, 409. 



Eozoic rocks of North America, 75, 

 277. 



Eozoon Canadense, 302, 303, 326, 342, 

 411; E. Bavaricum, 368. 



Epidermal tissues, their relations to 

 coal, 181. 



Epidotic rocks, 32, 243, 249, 408. 



Epigenesis, 286, 313, 317. 



Equilibrium of pressure, 15, 76. 



Equivalent volumes, 433, 436, 440. 



Equivalent weights of oxygen and "car- 

 bon, 176; of compound species, 432, 

 441; defined, 455. 



Erian rocks, 419. 



Irosion as related to mountains, 52, 74. 



)ruptive rocks. See Exotic rocks. 



Esmark on norites, 279. 



Essex County, New York, norites of, 

 279. 



faphotide, 330, 334, 445. 



Eurhizene of Laurent, 467. 



Evans on petroleum, 174. 



Exotic rocks, 4, 9, 16, 24, 44, 58, 66, 

 188-190, 284; banded structure in, 

 186; local alteration by, 298. 



?AHLERZ, 217. 



? airbairn on relations of pressure to 



fusion, 39. 

 Fan-like structure of the Alps, 342, 



343. 

 Fariolo, Italy, granites of, 201. 



