354 



INDEX 



Chicken-pox, duration of acquired 

 immunity to, 117 ; in relation t 

 evolution, 207 

 Children, cause of susceptibility t 

 disease, 171 ; contrasted with 

 adults, 245 

 Chinese, immunity to tuberculosis 

 151 ; opium smoking, 199 ; educa 

 tion of, 327 

 Cholera, evolution against, 154 



habitat of, 169 ; antiquity of, 171 

 Christians, early, 296, 306 

 Church, influence on civilization, 285 



309 



Civilization, relation to religion, 298 

 Colleges of Physicians and Surgeons 



on physical deterioration, 331 

 Colles, on syphilis, 128 

 Colonization of America, 185 

 Colour, influence of light and tempera 



ture on, 41 

 Columbus, introduction of disease to 



America by, 181 

 Conception, 220 

 Congenital characters, 6 ; diseases, 



157 

 Coolies, sufferings from malaria in 



British Guiana, 137 

 Corbie, on pigeons, 72 

 Correlation of mind and brain, 246 

 Coutts, on wasting of hand-fed 



syphilitic children, 131 

 Crab, lack of memory, 223 

 Craddock, Dr. , on increase of lunacy, 



350 



Creoles, immunity to malaria, 137 

 Crime, causation of, 308, 311 

 Cross-breeding, effects of, 69 et seq. ; 



beneficial effects, 97 

 Cunningham, Prof., on physical de- 

 terioration, 332 



Cypris reptans, variations in, 49 ; lack 

 of regression, 84 



Dark Ages, 308 



Darwin, Charles, founded systematic 

 study of heredity, 1 ; theory of 

 Pangenesis, 8, 9 ; maternal im- 

 pressions, 26 ; regeneration in 

 salamanders, 31 ; exclusive in- 

 heritance, 48 ; monsters, 54 ; dor- 

 mant characters, 62, 63 ; pigeons, 

 72 ; fowls, 72 ; reversion in flowers, 

 73-4 ; apples, 78 ; hyacinth, 78 ; 

 pansy, 79 ; pears, 80 ; wheat, 80 ; 

 ill effects of in-breeding, 97 ; cross- 

 breeding, 97 ; sterility, 99, 100 ; 

 tameness of animals, 229; domesti- 

 cation, 238 



Darwin, Sir F. , on pigs, 71 



Darwinism, Neo-, theory of heredity 

 and evolution, 16 ; incompatibility 

 with Lamarckian doctrine, 19, 23 ; 

 and with doctrine that variations 

 are due to direct action of environ- 

 ment, 44 ; applied to disease, 112 

 Davis, on measles in Samoa, 152 

 Death, causes of, in Western Hemi- 

 sphere, 183 



Definition of Heredity, 1 

 Deliberate actions, 218 

 Descartes, on animals as automata, 



262 



Desires, 217, 261 

 Deterioration, physical, Committee 



on, 331, 335 



Diarrhoea, evolution against, 154 

 Dicquemase, on memory in oysters, 



226 



Diday, on syphilis, 128 

 Diphtheria ; duration of acquired 

 immunity, 117 ; serum treatment 

 of, 119 ; disintegration of bacilli, 

 123 ; antiquity of, 170 

 Diseases, as tests of doctrines of 

 heredity, 112-13, 134, 157 ; evolu- 

 tion of, 170 ; persistence of, 173 ; 

 origins from single centres, 173 ; 

 ancient freedom of Western Hemi- 

 sphere from, 174 ; spread of, 176 ; 

 of lower animals, 177 ; passage of 

 from epidemic to endemic, 177 ; 

 introduction to America, 182 ; 

 contagious, 176 ; animal-borne, 

 176 ; air-borne, 176, 178, 182, 

 338 ; earth-borne, 176, 180, 182, 

 377 ; water-borne, 176, 337 

 Domestication ; effects on fertility, 

 101 ; capacity of animals for, 

 238 

 Dow, General Neal, on drunkenness 



in Portland, 341 

 Dragon-fly, instincts of, 224, 263 

 Dreams, 233 



Drinking, among Jews, 202 ; Greeks 

 and Romans, 202 ; Gauls and 

 Germans, French, English, 203 

 drunkards, varieties of, 194, 345 

 Dysentery, evolution against, 154 ; 

 antiquity of, 171 



Sckersley, Capt. H., on malaria, 172 



Education ; effects of play, 242 ; 



importance of, 284 ; in relation to 



religion, 297 ; Pagan, 304 ; formal, 



315 ; of the working classes, 315 ; 



of the higher classes, 316 ; classical, 



317 ; scientific, 323 ; medical, 325, 



328 



Ehrlich ; theory of acquired im- 



