INDEX. 



585 



Smith, William, 67, 241, 249, 344; 

 William, Geological Map of Eng- 

 land, 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. 236; quoted, 226, 

 228, 239, 240, 246. 



Sorby, 272. 



Sorley, on Weber's law, 454. 



Species, the human, 481. 



Specific average, 408. 



Spectroscope, uses in astronomy, 211. 



Spectroscopic study of the stars, 

 217. 



Spectroscopy, establishment of by 

 Kirchhoflf and Bunsen, 31. 



Spectrum analysis, 67, 211. 



Spectrum analysis, history, 214. 



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

 438, 455 ; cell-division, 362 ; 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, 892. 



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. 



Swan, spectroscopy, 213, 214. 



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-spote, 204. 



Sutherland, evolution of the moral 

 instincts, 493. 



Sutton, 392. 



T. 



Tait, 235 ; quoted, 135, 139, 145, 208 ^ 

 age of the earth, 242 ; comets' 

 186 ; grained structure of mat- 

 ter, 172 ; solar energy, 207 ; 

 theory of matter, 167. 



Talbot, spectroscopy, 218. 



Teall, quoted, 251. 



Tektosphere of the earth, 238 



Telluric lines, 213. 



Thermo-chemistry, 114. 



Thilorier, 86. 



Thomsen, Julius, 115. 



Thomson, Elihu, quoted, 162. 



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



Thomson, Thomas, 113. 



Thomson (Lord Kelvin), 148, 208, 

 235, 241 ; galvano-meter, 159. 



Thomson and Tait, 134, 139. 



Thury, 392. 



Thymus gland, 297. 



Thyroid gland, 291. 



Tidal friction, 222. 



Tissues, 330 ; defined, 301 ; physio- 

 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, 



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, 358. 

 Uniformity illustrated, 251. 

 Uniformity of Nature, 51, 53. 

 Uniformitarian school of geologists, 



Unity of life, 34. 



Unity of the organism, 288, 296. 



Unity of science, 38. 



Unity of nature, 39. 



Valency, theory of chemical, 104, 



129. 

 Valentin, 856. 

 Van Beneden, 359, 360, 371. 

 Van der Waals, 150. 

 Van Gehuchten, 306. 



