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INDEX.
347
Frost, effects of, as an agent of disintegration, ii. 11.
G.
Gainard and Quoy, MM., their observations on the labours of coralligenous zoophyta, i.331.
Galena, sublimation of, by steam, ii. 197.
Gallapagos Islands, volcanic origin of, ii. 230.
Ganges, analysis of the waters of the, ii. 34.
Garnets, where found, ii. 138.
Garonne, tertiary deposits of the basin of the, i. 257.
Gas, carbonic acid, in calcareous strata, ii. 129.
Gasteropoda, number of, found fossil, i. 80. Table of genera of, 82.
Gautemala. volcanos of, ii. 229.
Geneva, lake of, reference to the deposits of, as forming the delta of the Rhone, ii. 25.
Gensanne, M., his experiments on the temperature of the Vosges mine, ii. 270.
Geography, physical, of the globe, the subject considered, ii. 286. See Earth, Globe, Strata.
Geological Intersector, Professor Phillips', i. 68.
Geological Map, Professor Phillips', ii. 320.
Geological time, scale of, i. 8. Lapse of, inferred from series of rocks, 10. Nature of the scale of, 12. Terms of the scale, 12. 14. Interruptions of the series of, 16. Length of the scale, 17.
Geology, and Geological Theory, objects of, i. 1. Means of investigating, 6. How distinguished from Natural History, P. Its phenomena, how interpreted, 20. Analogy between the tertiary and modern periods of, 99. State of, ii. 277. Considered as one of the inductive sciences, 279. Errors to be guarded against in study of, 280. Phenomena of the earth, proper subjects for geological observation, 281. Leibnitzian and Huttonian theories considered, 285. Its physical geography and phenomena examined, 286, et seg. See Strata. Popular views and economical applications of, 317, et seq. Benefits conferred on mankind at large, by its pursuit, 326, et seq. See Earth.
"Geology of Yorkshire," references to, i. 137. 172. 190. ii. 112. 162. 311. 335.
Georges Gmünd, ossiferous beds of, i. 280. 3?0. Animal remains of, ii. 46.
German Ocean, peculiar shells of the, i. 269. An examination of its organic contents recommended, ii. 36.
Germany, volcanos of, ii. 223. Thermal springs of, 256.
Giant's Causeway, i. 63. 244.
Girogmagny, mines of, their temperature, ii. 270.
Glaciers and their phenomena, i. 294298. ii. 13, et seq. Their origin, ii. 12.
Gleichenberg, in Styria, trachytic mountain of, ii. 225.
Glen Coc, porphyry discovered in, i. 121.
Glen Tilt, granitic veins in, i. 109. Crystallised primary limestones of, 116. Hornblende schist of, 117.
Globe (see Earth), construction of the, how ascertained, i. 7. Age of its strata, how determined, 8, et seq. Physical changes of, what means to be taken for acquiring a knowledge of, 18. 20. General reasonings concerning the substances of, 23. Its mass, whence derived, 28. Structure of its external parts, 33. Disturbances in crust of, at close of Silurian period, 149. Disturbances at close of the Secondary period, 244. Disturbances during and after Tertiary period, 276. Waste of the surface of, ii. 9. Rain, &c., as agents of disintegration of, 10, et seq. Unstratified rocks in crust of, 71. Heat of, 72. Modern effects of heat in, 200. Experimental inquiries into heat of, 262. See Heat. Its physical geography, 286. A knowledge of its construction, &c. necessary for all the purposes of life, and benefits conferred by this knowledge on mankind, 317, et seq. 326, et seq.
Gneiss and Mica Schist systems, i. 111. Their composition, 111. Lamination prevalent in, 114. Stratification less easily traceable in, than in other systems, 115, Remains of organic life seldom traced in, 1 18. Extent to which they prevail, 119. Found
