478 



INDEX. 



Concentration of metals in nature, 227, 

 235. 



Concretionary structure, 9. 



Connecticut, gneisses of, 248. 



Conocephalites in North America, 260, 

 391, 404. 



Continent, a prc-palaeozoic, 75, 76. 



Continental elevation, 63, 76. 



Conularia, n phosphatic shell, 312. 



Cooke, J. P., on allomerism, 447. 



Cooling globe, its chemistry, 1, 38, 40, 

 60, 63, 301, 306. 



Coos group, 282. 



Copper-ores, origin of, 232; of Blue 

 Ridge, 217. 



Coprolites, 152, 225. 



Cordier on limestones and dolomites, 81. 



Corundum, 247; its supposed trans- 

 formations, 326. 



Gotta, Von, on granitic veins, 191. 



Credner, H., on Eozoic rocks of North 

 America, 277 ; on comparative geog- 

 nosy, 278; on the origin of silicates, 

 304, 305. 



Crinoids, fossil, injected with silicates, 

 304. 



Croft, H., on various mineral waters, 

 130, 134, 145. 



Crust of the earth, 1, 40, 60-64, 223 

 its flexibility, 8, 15, 57, 72; corruga- 

 tions of, 57, 74; its disintegration, 63. 



Crystalline aggregation of matter, 305. 



Crystalline rocks, two great classes, 

 283; evidences of their plasticity, 

 4 ; how formed, 24, 283 ; evidences of 

 life in, 13, 302. 



Crystalline schists, relative ages of, 

 i9; are pre-Cambrian, 327; origin 

 of, 283; supposed plutonic, 294; 

 Daubre'e on, 301; GUmbel on, 305: 

 Credner on, 305; Favre on, 347. 



Crystals, rounded, 212; hollow or 

 skeleton, 201, 212. 



Cumberland, England, crystalline 

 schists of, 273. 



Cyanite rocks, 28, 34, 243, 272. 



Cycles in sedimentation, 155, 241. 



DALMAN on trilobites, 365. 

 Damour, A., action of water on 

 lites, 102; on jadeite, 446. 



)ana, J. D., on the fluidity of the 

 earth's interior, 56; on granite veins, 

 199; on pseudomorphism, 287, 291, 

 318, 319, 320-323; on regional met- 

 amorphism, 291, 320, 322 ; on equiv- 

 alent volumes, 433. 



Danville, Maine, granite veins of, 197. 



Daubeny on volcanoes, 62. 



Daubre'e on the action of heated wa- 

 ters, 6 ; on the attrition of rocks. 20 ; 

 on the waters of Plombieres, 25; on 

 the production of silicates, 25, 297; 

 on silicious deposits, 89; on regen- 

 eration of feldspar, 100; on granitic 

 veins, 191, 209; on the origin of 

 crystalline schists, 301; on the pri- 

 meval atmosphere, 301. 



Davy, H., on volcanoes, 62. 



Oawson, J. W., on dissolving of iron- 

 oxide from sediments, 13 ; on the 

 origin of coal, 180-182; on Eozoon 

 'Canadense, 302 ; on palaeozoic for- 

 aminifera, 411 ; on the geology of 

 Nova Scotia, 408; on Erian rocks, 

 419 ; on Cambrian and Silurian, 424. 



Dead Sea, water of, 83. 



Decomposition, double, in chemistry, 

 428, 451. 



Decomposition of crystalline rocks, its 

 antiquity, 10, 100, 250. 



Delabeche on crystalline rocks, 301. 



Delesse, A., on envelopment of min- 

 erals, 288, 289, 314, 315; on pseudo- 

 morphism, 292, 314-318; his change 

 of views, 316; on the origin of ser- 

 pentine, 316, 317; on protogine, 330. 



Deoxidation in nature, 23, 230, 302. 



Deville, H. Ste.-CIaire, on dissociation, 

 37; on river- waters, 84; on crystal- 

 line aggregation, 305. 



Diabase, 31. 



Diagenesis in rocks, 305, 317, 321. 



Differentiation, chemical, 450. 



Dikes, distinguished from veins, 193, 

 202. 



Diorite, 23, 26, 32, 186, 243, 247, 249, 

 269, 270, 330, 331, 408. 



Disintegration of the primitive crust, 



zeo- Dissociation, chemical, 37. 

 Dipyre, 446. 



