INDEX. 



535 



Smith, Wmisra, 7, 241, 249, 844; his 

 epoch-making Geological Map of 

 England, 233. 



Social evolution, factors in, 517. 



Social organism, theory of, 503. 



Society, as a vast fraternity, 408. 



Sociology, scope of, 496 ; outline of 

 its development, 498 ; lines of 

 enquiry, 501 ; factors in sociolo- 

 gical interpretation, 508. 



Solar Energy, 207. 



Sollas, age of the earth, 244 ; history 

 of the earth, 238; quoted, 286. 

 228, 239, 240, 246. 



Sorby, 272. 



Sorley, on Weber's law, 454. 



Species, the human, 481. 



Specific average, 408. 



Spectroscope, uses inastronomy,211. 



Spectroscopic study of the stars. 

 217. 



Spectroscopy, establishment of by 

 Kirchhoff and Bunsen, 31. 



Spectrum analysis, 67, 211. 



Spectrum analysis, history, 214. 



Spencer, Herbert, 338, 376, 414, 427, 

 438, 455 ; cell-division,862 ; classi- 

 fication of the sciences, 28 ; here- 

 dity, 402 ; his conception of soci- 

 ology, 499 ; on the social organ- 

 ism, 503. 



Spermatozoon, 370. 



Spleen, 291. 



Spongioblasts, 305. 



Stahl, 77, 141. 



Starkweather, 392. 



Stars, 188 ; distance of, 191 ; life of, 

 195 ; weighing the, 194 ; variable, 

 197; fixed, 198; dead, 197. 



Stas, 88, 108. 



Stellar spectra, 217. 



Stieda, 298. 



Stohr, tonsils, 299. 



Stokes, Sir Gabriel, 214. 



Stoney, Johnstone, 75. 



Stout, on mind and brain, 447 ; defini- 

 tion of psychology, 470. 



Strasburger, 359, 360, 371. 



Stratigraphical geology, 233, 248. 



Struggle for existence, 436. 



Struve, father and son, 190, 191. 



Struve, F. G. W., 194, 205. 



Stuart Glennie, 520. 



Substitution of organs, 342. 



Substitution-theory, 103. 



Succession, idea of geological, 233. 



Suess, work of, 258 ; earthquakes 255 

 Antlitz der Erde, 257, 258. 



Sun, its heat, 206. 



Sun-spots, 204. 



Sutherland, Evolution of the Moral 

 Instincts, 493. 



Button, 392. 



Swan, spectroscopy, 213, 214. 



T. 



Tait, 235 ; quoted, 135, 139, 145, 808 ; 

 age of the earth, 242; comets, 

 186 ; grained structure of mat- 

 ter, 172 ; solar energy, 207 ; 

 theory of matter, 167. 



Talbot, spectroscopy, 213. 



Teall, quoted, 251. 



Tektosphere of the earth, 238. 



Telluric lines, 213. 



Thenno-chemistry, 114. 



Thilorier, 96. 



Thomsen, Julius, 115. 



Thomson, Elihu, quoted, 162. 



Thomson, J. J., 164 ; quoted, 157. 



Thomson (Lord Kelvin), 148, 203, 235, 

 241 ; galvanometer, 159. 



Thomson, Thomas, 113. 



Thomson and Tait, 134, 139. 



Thury, 891, 392. 



Thymus gland, 297. 



Thyroid gland, 291. 

 Tidal friction, 223. 



Tissues, 330 ; defined, 801 ; phvsio- 

 logy of, 300. 



Titchener, on modern psychology, 

 443. 



Tonsils, 299. 



Torell, 262. 



Transformations of energy, 138. 



Transmissibility of acquired char- 

 acters, 412. 



Traquair, quoted, 346 ; on Palaeos- 

 pondylus, 351 ; on palaeontology, 

 345,351. 



Trowbridge. 216. 



Turner, Sir William, 356, 414 ; quoted, 

 311, 314, 477. 



Turpin, 355. 



Tylor, 480. 



Tyndall, 208. 



Types, theory of chemical, 103, 



U. 



Unger, 356, 858. 



Uniformitarian school of geologists 



225. 



Uniformity illustrated, 251. 

 Uniformity of Nature, 51, 53. 

 Unity of life, 34 

 Unity of nature, 39. 

 Unity of science, 38. 

 Unity of the organism, 28S, 296. 



V. 

 Valency, theory of chemical, 104, 



Valentin, 856. 

 Van Beneden, 359, 360, 871. 

 Van der Waals, 150. 

 Van Gehuchten, 306. 



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