INDEX 



547 



Speculation, 355, 506; legitimacy of, 507 



Speech, 396, 422 



Spencer, Herbert, theory of evolution, n ; 



on living body as crystal, 65 ; on evolution 



of higher animals, 72 ; on memory, 406 

 Sperms, union with ova, 2 ; equivalent with 



ova as bearers of heredity, 2 ; traits of, 143 

 Sports, or large variations, 22 

 Sporting instinct, 384 

 Stability of type, 526 

 Stag, horns of, 10 

 Stagnation, mental, 427 

 Starvation, effects of on mother and foetus, 441 

 Statistics, vital, 224 

 Sterility, on blending of alternative traits in, 



190 

 Stimulus for growth, 6, 7, 8, 438 ; nutriment 



as, 8 ; use as, 7, 11-13 '> injury as, 7, 9-11 

 Stone age, diseases in, 275 

 Stupidity, natural, 381, 425 ; artificial, 439, 



477, 494 

 Succession, invariable, 336 ; necessary, 337, 



343 



Sucking in infants, 383 

 Sugar, in manufacture of alcohol, 457 

 Sullivan, Dr W. C., 315 et seq., 318 et seq. 

 Superficial thinking, 15, 76 

 Superstition, denned, 492 

 Susceptibility of germ-plasm to environment, 



66 et seq., 98 ; to charm of alcohol, 289, 



293. 457 



Sutton & Co., on culture of plants, 112 

 Symbolism, mental, 327 

 Syphilis, alleged inheritance of, 75, 242 ; 



duration of, 234 ; recovery from, 249 ; 



antiquity of, 269 ; migrations of, 270 

 Systematists, rejection of Darwin's work by, 



506 

 Systematic sciences, 39, 354, 504 



TEACHER, the skilful, 481 



Teaching, for the professions, 482 et seq.; 



biological, 484, 510 et seq. ; religious, 486 et 



seq.\ classical, 501; science, 502; scientific, 



489, 502 



Teeth, human, 223 

 Telegony, 75-6 



Tests, for hypotheses, 39, 345 

 Texas, fever of cattle, 82, 275 

 Think, instinct to, 403, 478 

 Thinking, in terms of germ-plasm, 15, 25 ; 



means for securing accuracy, 42 et seq.\ 



coherent, origin of, 330, 340 ; skill in, 339, 



342, 400, 401, 485 etseq., 500 et seq., 504, 511 

 Thirst, 285, 286, 384 

 Thought, limits of, 340 

 Tickling, 371 



Tobacco, racial effects of, 308 

 Toleration, of poisons, 245, 247 ; of opinion, 



497 



Tonga, morals in, 423 

 Towns of Europeans in Asia and Western 



Hemisphere, 280 

 Toxins, evolution of, 88 et seq. ; counter-, 231 ; 



intra- and extra-cellular, 232, 237, 253 ; 



produced by plants and higher animals, 



242 ; toleration of, 245, 247 



Traditional knowledge, 381, 397 



Training, mental, possibilities of, 477, 483 ; 

 in school-room, 479 



Transmission or transmutation of acquire- 

 ments, 19, 61 et seq., 251, 258 



Truths, necessary, 344, 346 et seq. , 349 



Tse-tze fly, 275 



Tuberculin, 253 



Tuberculosis, microbes of, 229 ; recovery 

 from, 233 ; spread of, 274, 279 ; compared 

 to alcohol, 308 : effects of sanitation, 450, 

 453 ; human and bovine, 453 



Tugwell, Bishop, on drinking in West Africa, 



33 



Turner, Prof. H. H., on New Euclidtans, 

 344 ; on resemblance and divergence from 

 parents, 517 ; on the influence of sex, 520 

 et seq. ; on assertive mating, 521 ; on trans- 

 mission of sexual traits, 523 ; on stability 

 of type, 526 , on abbreviation of life-history, 

 527 ; on natural selection, 529 ; on retro- 

 gressive tendency, 533 



Twins, identical, 17 



r 



UEBERWEG, on crucial instances, 165 



Understanding, nature of, 349 



Unicellular organism, i 



United States, temperance legislation in, 461 

 et seq. 



Units, ancestral, 124 



Urban conditions, 448 



Use, as stimulus for growth, 7, n et seq. y 

 442-3 ; mistaken idea about, n et seq. ; 

 not stimulus for growth of all characters, 

 12, 89 ; hypertrophy of brain from, 396 

 j Use-acquirements, utility of, 69 et seq. , 389 ; 

 magnitude of, 7, 71 ; limited to higher 

 organisms, 12, 90 ; in disease, 247, 253 



Utility, of old-established traits, 112 



VACCINIA, 239, 248, 273 



Variability, 98 et seq. ; an adaptation, 100 et 

 seq. ; established by Natural Selection, 102 ; 

 biometric investigations, 138 ; occurring 

 apart from conjugation, 147 ; diagram- 

 matic representation of, 518, et seq. 



Variations, from parents, 21, 80, 196; pro- 

 gressive and retrogressive, 22, 220 ; con- 

 tinuous and discontinuous, 22, 150 ; nature 

 of, 21-22 ; interpolated, 26 ; difficulty of 

 accounting for, 58 ; distinguished from 

 modifications, 22, 78 ; spontaneous, 79 ; 

 caused by direct action of environment, 79, 

 92, 96 ; of unicellular organisms, 89 et seq. ; 

 place of occurrence, 102-3 '> bud-, 103 ; cause 

 of, 105, 147-8, 259, 474 ; elimination of use- 

 less, 118; in parthenogenesis, 147-8; defini- 

 tion of, 438 



Varieties, crossings of natural and artificial, 

 173 et seq. ; relative numbers of, 202 



Veil of familiarity, 13 



Vernon, Dr H. M., on correlated traits, 70 ; 

 on experiments on beans, 84 ; on Law on 

 Ancestral Inheritance, 128, 130 ; on Natural 

 Selection, 136; on reversion in plants, 156 



