INDEX. 



45' 



Science and theology, 46. 

 Scotland, sandstone of, 131. 

 Sculpture in primeval times, 365. 

 Scythians on secular revolutions, 382. 

 Sea-urchins, 316. 

 Sea-weeds of Potsdam, S3. 



" " Upper Silurian, 124. 



Sediments formed and distributed, 5T. 



" distribution of, 132. 



Seeds, vitality of, 250, 260. 

 Selma, Alabama, reptiles of, 190. 

 Septa in chambered shells, 119. 

 Serapis, Temple of, 19. 

 Serpents, position of, 168. 

 Shaft of a mine, 139. 



" miners descending a, 140. 

 Shaler, N. S., on central heat, 433. 

 Shales a source of petroleum, 281, 282, 288. 

 Shell-heaps of primeval times, 360, 364. 

 Shells, fossil and recent, 14. 

 Shumard, B. F., on Potsdam sandstone,79. 

 " " " Lower Helderberg, 125. 



Siberian ice and elephants, 221. 

 Sibylline Books, 3S4. 

 Sigillaria, 158, 159. 

 Silurian rocks, 75. 



" Upper, rocks and fossils of, 124. 

 Siphon in chambered shells, 119. 

 Sivatherium, 203. 

 Skovmose in Denmark, 253. 

 Smell of petroleum illusory, 277, 278. 

 Smithsonian Institution, 210. 

 Solar heat wasting, 409. 



" " amount of, 422. 



" system in a blaze, 36, 38. 



" " rotating in a gaseous state, 



43. 

 Solenhofen, fossil of, 184. 

 Specimens of rocks about our doors, 62. 

 " illustrative, of animals, pre 



served, 32. 

 Specimens, illustrative, of primordial 



matter, 41. 

 Specimens, illustrative, of planetary 



stages, 46. 

 Spectroscope and its revelations, 425. 

 Speech possessed by primeval man, 363. 

 Spirifers, 316. 

 Spiritual bodies, 372. 



" phenomena, 371. 

 Spirits in search of oil, 280. 

 Splintery coals, 288. 

 Sponges in Lower Silurian, 82. 

 Springs and wells, 233. 

 Spring-poles in well-boring, 286. 

 Soils, changes in, and their effects, 251. 



" of prairies, see Frames. 

 Somme, human relics in valley of, 356, 367. 

 Southern States, surface materials of, 222, 



229. 

 St. Acheul, flint implements at, 356. 

 " Augustine, changes of level at, 22. 

 " Clair Lake and Plats, 241. 

 " John's group of rocks, 74. 

 " " period, climate of, 105. 

 " Joseph, Michigan, climate of, 226. 

 " Louis, Missouri, prairies of, 268. 

 Star-fishes, 316. ■ 



U 



Stars as solar centres, 425. 

 Steenstrup on skovmose, 253. 

 Stevens, Cape, work of the elements at,27. 

 Stigmaria, 158. 



Stoics on periodical catastrophes, 385. 

 Stone Age, 353. 

 " lilies, 105. 

 Stones in the soil ; utility of, 265. 

 Stony Point, glacier action at, 217. 

 Strata, aqueous origin of, 18, 30. 



not created as we find them, 29. 

 mechanical and chemical, 62 

 Streptospondylus, 1S8. 

 Striae, glacial, 215, 217. 

 Sturgeon, 166. 



Submergence of the continents, 228. 

 '' " prairie region, 246. 



Subsidence of the continent, 222, 311. 

 Substance, other forms of probable, 372. 

 Subterranean clay basins, 232. 

 Succession of strata, 133. 



" organic types, 326. 

 " ideas repeated, 327. 

 Suckers of cephalopods, 114. 

 Sugar-Loaf, Mackinac Island, 247. 

 Sumuerville, Tennessee, geology of, 255. 

 Sun cooling off, 408. 



amount of heat from, 408. 

 distance of, 421. 

 constitution of, 426. 

 Superior, Lake, see Lake Superior. 

 Superiority of ~au over brutes, 375. 



criteria of, 323. 

 Supplies of petroleum, 286. 

 Surface materials of Southern States, 222. 

 " assorted, 232. 

 oil at Enniskillen, 292. 

 " shows of petroleum, 276. 

 Sutro tunnel, 440. 

 Swales, 267. 

 Swallow, G. C, on Missouri, 125. 



" " " Permian rocks, 172. 



Syenites, 52. 



Symplegades, character of, 25. 

 Synthetic reptiles, 173. 



" types, 31S. 

 Syracuse, New York, geology of, 125. 



Taste of primeval man, 359, 365. 

 Teeth of reptiles, 191. 

 Telerpeton JElginense, 166. 

 Teliost fishes, 317. 

 Temple of Jupiter Serapis, 20. 

 Tennessee, oil regions of, 288. 



salt rocks of, 305. 



central basin of, 342. 

 Tepen in Aztec mythology, 388. 

 Terebratulas, 316. 

 Terraces, 230, 246, 247. 

 Terrestrial habits in respect to rank, 323. 

 Tertiary mammals, 205. 

 vegetation, 254. 

 Texas salt rocks, 305. 

 Theistic opinions sustained, 46. 

 Theory of salt formations, 301. 

 Thompson, Sir Win., on central heat. 4S5. 

 Thoughts in a coal mine, 148. 



on fossil footprints, 1S6. 



