INDEX. 



329 



Till defined, 20, 277, 282. 

 Tillotherium, 256. 

 Time, geological, 288. 

 Tinoceras, 257. 

 Torrential action, 21. 

 Tracks in sandstone, 248, 249. 

 Translation, earthquake of, 106. 

 Transportation of Drift, 15. 

 Trap eruptions in Trias, 250. 

 Travertin, 35 ; deposited by geysers, 83. 

 Trends of mountain axes, 118. 

 Triassic, lavas, 94; sandstones, 172; 



mammals, 252. 



Trilobites, 191 ; Cambrian, 234. 

 Tube of a geyser, 82. 

 Tufa, 35. 



Ulnta Mountains upraised, 268. 



Uintatherium, 257. 



Unity of nature, 312 ; evinced in light, 

 313; in planetary laws, 313; in 

 world stuff, 314; in unity of de- 

 velopment, 315 ; in relations of man 

 and nature, 316; in mental and 

 moral faculties, 316; in relations 

 of man and God, 317. 



Uplifts of strata, 116. 



Vapor defined, 204. 

 Vegetation of coal beds, 150, 174; of 

 Cretaceous, J70; of Eozoic, 232. 



Veins of ores, 128. 



Vertebrates, earliest, 236; limbs of, 

 255. 



Vesuvius, 83 ; eruptions of, 87. 



Vibration, earthquakes of, 104. 



Vogt, Carl, on Archeeopteryx, 261. 



Volcanic eruptions of far west, 269. 



Volcanoes, 85 seq., 269; and earth- 

 quakes, 106, 116. 



Wahsatch, 266, 267. 

 Warm springs, 81, 83 seq. 

 Wastage of the land, 53, 54, 271. 

 Wasted continental surface, 271. 

 Water- basins in the earth, 31. 

 Water, first condensation of, 222. 

 Waverly Sandstone, 242. 

 Waves of earthquakes, 103. 

 Wells and springs, 31, 32. 

 Widder, fossils at, 182. 

 Will, the only source of energy, 309. 

 Winchell, N. H., on Falls of St. An- 

 thony, 292. 



World, has been built, 12. 

 World-stuff, 208. See "Cosmic dust." 

 Wrinkling of strata, 116, 227, 246. 



Yakutsk, frozen soil at, 99. 

 Yellowstone Lake, 80. 



Zeuglodon, 165. 



