670 



INDEX. 



TER 



WHE 



Tertiary deposits, climate of warmer, 199— 



203 

 Testacea. See Shells. 



Testa on Monte Bolca fish, 65 

 Texture, transition of rocks, 141 

 Thames, valley of, Tertiary strata in, 192 

 Thanet, Isle of, loss of land in, 525 

 Theophrastus, opinions of, 19, 20 

 Thermal springs frequent in volcanic re- 

 gions, 394 

 Thury, M. H. de, on Artesian wells, 393, 390 

 Thylac other him Prevostii, 159 

 Tibet, yak or wild ox of, in ice, 190 

 Tidal currents, depositing power of, 565 

 Tides, difference in the rise of the, 493 



— height to which they rise, 493 



— their destroying and transporting power, 



565 

 Tierra del Fuego, temperate climate of, 241 



Tigris and Euphrates, their union a modern 



event, 484 



— delta of the, 434 



Time, prepossessions against length of past,91 

 Tivoli, flood of, 354 



— travertin of, 405 



Torquay, submerged forest of, 544 

 Torre del Greco overwhelmed by lava, 65 

 Torrents, action of, in widening valleys, 344, 



346 

 Trade winds, 497 

 Traditions of deluges, 593 

 Transition texture, 141 

 Trap rocks of many different ages, 117 

 Travertin of the Elsa, 400 



San Vignone, 400 



San Filippo, 402 



— formed by calcareous springs, 401 



— of Tivoli, section of, 406 



— spheroidal structure of, 403 

 Tree ferns, distribution of, 22 4 

 Trias, fossil mammalia of, 161 

 Trinidad, pitch lake of, 414 



Tristram, Mr., on volcanic deposits of Red 



Sea, 591 

 Tuscany, geology of, 59 

 Tyndal on motion of glaciers, 373 

 Tyrol, earth-pillars of, 335 



UNCONFORMABLE strata, inferences 

 ^ derived from, 316 



Uniformity of geological changes, 305—309 

 Universal deposits, theory of, 112 

 -- ocean, theory of, 40, 51 

 Upheaval, proofs of slow, 131 





VALLEYS, excavation of, in Central 

 France, 356 



— newly formed, 344 



Vallisneri on natural causes of change, 54 



— on origin of springs, 50 

 Vedas, sacred hymns of, 6 



Venetz on recession of glaciers before tenth 

 century, 27 8 



Verneuil, M. de, cited, 251 



on roeksalt of Cardona, 114 



Vesta, temple of, 355 

 Vesuvian minerals, 632 

 Vesuvius, ancient history of, 602 



— renewal of eruptions of, 603 



— dikes of, 627 



— history of, after 1138, 606 



— modern eruptions of, 618 



— scoriaa, ropy, 625 



— structure of cone of, 620 



— and Somma, ideal section of, 631 



Virlet, M„ on Samothracian deluge, 593 



Visp, earthquake at, in 1855, 341 



Vistula, River, its course diverted by packed 

 ice, 364 



Volcanic action defined, 577 



— district of Naples, 598 



— mud or ' moya ' of Andes, 583 



— region from Asia to Azores, 591 



— regions, geographical boundaries of, 579— 

 597 



— vents, linear arrangement of, 577 

 Volcanos, a cause of hot springs, 396 



— and atolls, map of active, 586 



— how to distinguish active from extinct, 597 



— of Phlegra?an Fields, 616 

 Sandwich Islands, 590 



— safety valves, according to Strabo, 25 

 Voltaire's attacks on Geology, 79 



Von Eaer, on ice -drifted rocks, 385 

 Von Buch cited, 225 



on felspathic volcanic rocks, 5S0 



formation of Monte Nuovo, 610 



hypothesis of elevation craters, 633 



on glacier in Norway, 380 



rents in volcanos, 614 



volcanos of Greece, 592 



Von Hoff on level of Caspian, 28 



Von Schrenck on migrations of animals, 180 



Vulcanists and Neptunists, 71 



ITT ALL, Mr., on pitch lake of Trinidad, 414 

 * ' Wallace, Mr. A., on former connection 



of Malay Islands, 250 

 on deposition of Nile mud, 437 



Wallerius, theory of, QQ 

 "Wallich, Dr., on Ava fossils, 43 

 wood in peat near Calcutta, 478 



'Warping,' land gained by, 569 



Waste and repair of coasts, Generelli on, 55 



Water, transporting power of, 347 



— action of running, 344 — 346 

 Webster, Dr., on rain-prints, 334 

 Wells, Artesian. See Artesian Wells. 

 Wener, Lake, horizontal Silurian strata of, 



315 

 Werner, his lectures, 68—70 



— on transition texture of rocks, 141 

 West Indies, active volcanos in, 584 



Upper Miocene strata of, 201 



Whales, migrations of, to north pole, 2S6 

 "Who well on geological enquiry, 86 



S 5 



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