OCR Text |
Show lNDEX. 475 Tempernture.-Contrast between tho temperature of the east coast of America and the we t coa t of Europe in the same latitudes, 114; general remarks on the temperature of the United States of Americtt, 115. Thian-schan, one of the four parallel mountain chains in Central A. ia, 74, l. Thibet, occupying the valley between the great chains of the Kuenli. in and Himalaya, divided into Upper, Middle, and Little Thibet; it mean elevation and description, 80. Tibbo, 70. Timpap.ogos, Laguna de, 55; is the Great Salt Lake of Fr~mont,, 219. Tradition of Samothrace, 278. Trees, age of, 283 ; trees of highest growth, 338. Trisetum ubspicatum, an inhabitant both of the Arctic and Antarctic Circles, 353. Tuaricks, 70. Urwald, or primeYal forest, a name too lightly used, 206; true character of a primeval forest, 207 ; description of the nocturnal life of wild animals in the Urwald, 209. Vegetation, its propagation and extension over 11ewly formed lands, 230; the absence of trees erroneously supposed to characterize hot countries, 232 ; extensive arid tracts in countries otherwise of luxuriant vegetation a geological problem which has not been sufficiently considered, 233 ; characteristic aspect of vegetation in the tropics, 245 ; characteristic vegetation of the Alps and Andes at great elevations, 248. V esu vi us, measurements of height at different periods, 384, 395; particulars of the eruption of 1822, 386. Vital force, the, or Rhodian Genius, 403. Volcanos of the Thian-schan chain situated in the interior of Asia far distant from the sea, 85; structure and mode of action of, 375; instances of extensive volcanic connection, 381; importance of repeating exact measurements of the heights of craters, 383. Willows, 244; 358. TilE END. |