INDEX. Fo-Gu 



537 



Forest of Dean iron ores, 430. 

 region of North America, 470. 



Forschammer on elements in the sea, 

 182, 390. 



Foster, Dr. Le Neve, on tin, 420, 

 on Haytor, 427. 



Fouque & Levy, on formation of igneous 

 rocks, 213. 



Fowey copper mines, 418. 



Fox, Rev, Darwin, on polacanthus, 517. 



Fox's, Mr. , electro - magnetic experi- 

 ments, 83. 



Foyaite, 223. 



Fraas, Oscar, on triglyphus, 520. 



Fracastorio, 5. 



Fractures and dislocations of strata, 333. 



Fractures of the Weald, 329. 



France, gold in, 417. 



granite in, 220. 



iron in, 435. 



Fraunhofer, 15. 



Freiberg gneiss, 23. 



mining district of, 413. 



Fresh-water deposits, 441. 



limestones, 49. 



Fringing reefs, 114. 



Fritsch, Anton, on amphibia, 507. 



Frost, action on rocks, 146. 



Fuchs, Karl, on volcanic distribution, 

 190. 



Fucus vesiculosus as a source of metals, 

 399. 



Fundamental gneiss, 373. 



Fungida, Duncan, on distribution of, 

 483. 



Furnas, springs of, 194. 



Furness, kidney iron ore of, 429. 



GABBRO, 40, 227. 



- of Mull, 317. 

 Galloway granite, 240. 

 Galway granite, 247. 

 Ganges delta, 166. 

 Ganoid fishes, 503. 



Gardner, J. S., on tertiary floras. 474. 

 Garnets, 26, 369. 



developed by basalt, 338. 

 Gash veins, 403. 

 Gasteropoda, 498. 



in fresh-water deposits, 441. 



succession of, 498. 



Gaudry on succession of mammals, 526. 



Enchainements de Monde Animal, 



521. 



on the struggle for existence, 521. 

 Gefle, raised beach-mark at, 326. 

 Geikie, A., on Ailsa Craig, 251. 

 on Eigg, 319. 



on foliation in volcanic ashes, 381. 



on Forth volcanic rocks, 308. 



on old red sandstone volcanic 



rocks, 299. 



on Permian volcanoes, 311. 



on pikrite, 310. 



James, on diallage at Pinbain, 367. 



Genera, existing distribution of, 4o6. 

 Genesis of genera, 440. 



Genus and species, 439. 

 Geological age of gneiss, 373. 



of granite, 221. 



evidence of nature of volcanic heat, 



172. 



publications, 528. 



Germany, granite in, 220. 

 Gesner, 3. 



Geysers of Iceland, 194. 



Giant's Causeway, 28, 43, 316. 



kettles, 154. 



Gibraltar, sea bottom at, 163. 



Glaciation of Anglesey, 129. 



Glaciers, 148. 



Glauconite, 21, 98. 



Glen Roy, 387. 



Sannox, granite of, 242. 



Shee, 384. 



Tilt, granite veins in, 249. 



Globigerina, 48. 



Glyders, Rutley on felstone of, 296. 



Gneiss, its origin, 370. 



resting on strata, 374. 



Goat Fell, 241. 



Godwin- Austen, R. A. C., on artificial 



classifications, 527. 

 ou lacustrine deposits, 138. 



Gogofaw, gold mines of, 417. 



Gold, 417. 



Goniatites, figure of, 500. 



Gorge, its excavation, 155. 



of the Rhine, 156. 



Gosau fauna, 516. 



valleys of secondary age, 142. 



Gradation of beds, 89. 



Graham Island, 180. 



Grampians, Judd on, 239. 



southern slope of, 383. 



Granite, geological age of, 221. 



in Scotland, 238. 



of Anglesey, 234. 



of Cornwall, 229. 



of the Isle of Man, 391. 



porphyry, 37. 



veins, 219, 248. 



Granites, their origin, 203. 



Granitic rocks of the Lake District, 235. 



texture, 33. 



Grauitite, 216. 



of South of Ireland, 392. 



Graphic granite, 217. 



Graptolites, 480. 



Gray, Dr. Asa, on forest regions, 470. 



Great masters in geology, 528. 



Greenland, depression of, 327. 



Green slates of Cumberland, 101. 



Gregory, Watts, experiments on basalts, 

 82. 



Greisen, 36, 422. 



Grenville series, 396. 



Grey gneiss, 373. 



Grit, 45. 



Groby syenite, 233. 



Ground mass, 254. 



Groups of British strata, 74. 



Guiscardi on fossils ejected from Vesu- 

 vius, 179. 



