Index. 399 



Sexual selection, Darwin's hypothesis of, 31-41 ; its place in evolution, 148, 289; 

 how it operates, 290 ; in mimicry, 308-309. 



Skilton, James A., on Herbert Spencer, 19-21 ; on vegetal evolution, 135 ; on evo- 

 lution of society, 203-227. 



Social Statics, when published, 5; Mr. Spencer's dissatisfaction with it, 5, 20, 

 229 ; principle set forth in it, 230. 



Socialism, 380. 



Societary evolution, 203-230. 



Society an organism, 217, 278, and note. 



Sociological Section of Birmingham, Eng., Nat. Hist. Society, letter from, re- 

 cognized, 391. 



Sociology, Principles of (see "Principles of Sociology"). 



Solar and planetary evolution, 55-75. 



Special senses, evolution of, 186. 



Spencer Herbert, his life and works, 3-22 ; letter from, 19 ; the most notable ad- 

 vocate of evolution before Darwin, 32 ; his early essay on development, 33 ; 

 his reception of Darwin's Origin of Species, 40 ; his sociological tables, 139; 

 his contribution to the theory of evolution, 142 ; relation of his philosophy 

 to the doctrine of the correlation of forces, 180 ; his psychology, 181, 186, 187, 

 188, 189, 190, 199; doctrine of the Unknowable, 181, 249, 250 note, 251, 331-334, 

 350-353, 364-365; his criticism of Romanes, 185; his ethics, 195, 259 -261, 266, 

 268-280; his sociology 203, 204, 217-223, 228, 229,230; on the temporary 

 nature of government, 230 ; on ancestor- worship, 235, 237-239 ; on mvth- 

 making, 240; his definition of life, 266 note; on design, 312 ; his religious 

 views criticised, 329-334; his philosophy, 348, 350, 353; his doctrine of the 

 interdependency of mind and matter. 36*3. 



Spencer, Rev. Thomas, 4. 



Spiritualism and materialism compared, 354 - 365. 



Spontaneous generation, 125-126, 140, 199, 309-310, 315. 



State socialism, judged by evolution, 380-381. 



Stevens, Prof. W. Le Conte, on geological evolution, 104-107. 



Stratified rocks, formation of, 84. 



Study of Sociology, 194, 203, 229. 



Sympathetic origin of altruistic feeling, 194-195, 267. 



Taylor, Joh>' A., on the evolution of society, 229 ; on the effects of evolu- 

 tion on civilization, 388-389. 



Tennyson, Alfred, his glorification of war, 360. 



Teutonic mythologies, in theological evolution, 242. 



Theism, as related to evolution, 16-17, 22, 46, loy, 107, 133-134, 143. 154. 156-157 

 216, 228, 233-253. 



Theology, Evolution of, 233-253. 



Theory of population, 5, 20, 21, 148, 172-173, 208-212, 260-261, 263-264. 



Thompson, Daniel Greenleaf, on Herbert Spencer, 3-1 s. 



Thomson, Sir William, his theory of the meteoric origin of life, 169. 



Tolstoi, Count Lyof N., his social ideal, 370-371, 373, 378. 



Transcendentalism, as related to evolution, 327, 346-347. 



Treviranus, an early advocate of evolution, 32. 



Tvndall, Prof. John, his intimacv with Herbert Spencer, 8; on matter and life, 

 310. 



Unknowable, Spencer's doctrine of, 16-17, 22 ; the doctrine criticised, 49-50, 

 199, 227,350-353; the principle, as stated by William Potts, 133; by Dr. 

 Eccles, 181-182,390; by Z. S. Sampson, 249-250; as related to religion ami 

 science, 331-334; to philosophy, 350-353, 364; the philosophical basis of 

 monism, 365. 



Uniformity, the doctrine of, 95, 344-346. 



Utopia, More's, 369. 



Variations, artificial, 33; as stated by Darwin, 35; in plant-life, 115-118; in ani- 

 mal life, 147-148, 151-154 ; origin of, 164-166. 

 Vedas, 242. 



Vegetable mould, the formation of, 29. 

 Vegetal life, evolution of, 111-136. 

 Virchow, Prof., his opposition to Darwinism, 173. 

 Vestiges of Creation, 32, 51, 



Vogt, Prof. Carl, on vegetal evolution, 131; on missing links, 305. 

 Volcanic Islands. 29. 



