570 



HEREDITY AND SELECTION IN SOCIOLOGY 



Survival of the fittest, doctrine of, 

 2,7,8 

 a factor of selection, 354, 

 855 

 Swinburne, A. C, poem on social 



conditions, 385 

 Syllabus, of Pius IX., illustrating 

 the claims of the Catholic Church, 

 527 

 SyphOis, transmission of, 69 



a cause of progressive paralysis, 



273 

 as a social factor, 288 

 transformed in recent years, 



289 

 affecting various organs of the 



body, 290 

 cerebral, 291 



a danger to the community 

 and the race, 291, 293, 295, 

 302, 304 

 among married women, 292, 



293 

 effects of, in later life, 295 

 hereditary results of, 295, 296, 



297, 299, 300 

 affecting infant mortality, 298 

 resulting in abnormalities, 299, 



300, 301 

 prophylactic measures against, 



302, 306 

 affected by late marriage, 336 



TcBuia solium, fecundity of, 7 

 Tails, short, not due to mutilation, 



67 

 Talents, specific, psychical, 59, 60 

 limit to, 61 

 heredity of, 61 

 Tarde, his theory of imitation, 181, 

 182 

 insufficiency of his theory, 182, 



223 

 doctrine of social psychology, 



364 

 on national character, 439 

 Teratological inheritance, 165 



malformations, transmission of, 

 165 

 Territory, influence of, on social 



evolution, 245, 247 

 Tichomiroff, experiments in par- 

 theno-genesis, 25 



Topinard, Paul, • and the Lamaro- 

 kian theory, 171 

 on economic conditions, 462 

 Toulouse, Dr., on economic condi- 

 tions, 462 

 Tradition and progress, 444-445 

 Traditional factor in race progress, 

 definition of, 426 

 progress of the race, 309 



as opposed to biological 

 progress, 310, 311, 312 

 Transmissible diseases, 66 

 Trilobites, extermination of the, 



152 

 Tuberculosis, transmission of, 69, 

 70 

 as a selective agency, 344 

 Tuberculous children, preservation 

 of, 349 



Use and disuse, importance in 



evolution of instinct, 74 

 Utopian legislation, 442 



Variability, due to use and disuse, 9 



a factor of selection, 354 

 Variations, ascendant and regres- 

 sive, 49 

 excessive, 55 



and adaptation, relation be- 

 tween, 56 

 morphological, alone controlled 



by germinal selection, 56 

 necessity of, 81 

 origin of, in germ-plasm, 132, 



134, 136 

 maintenance of, dependent on 



amphimixis, 136 

 correlation between primary 



and secondary, 137 

 produced by isolation, 142, 143 

 produced through amixis, 143 

 great number of, necessary for 

 maintenance of species, 159 

 maintenance of, depends on 



utihty, 178 

 imply adaptation, 178 

 Vertebrates, embryonic identity of, 



167 

 Verworn, Max, on instinct, 86 

 Vital affinities and the distribution 



of the ids, 34 

 Volvox, an example of Algse, 12 



