INDEX 



541 



Darwin, Mr Francis, on the transmission of 

 acquirements, 74 



Daughter-cells, i 



Davenport, Prof. C. B., on Mendelian traits 

 of poultry, 155, 172 ; on blending of 

 Mendelian traits, 160-1 



Deaf-mutism, inheritance of, 189 



Death certificates, 295 



Deduction, nature of, 42-3 ; function of, 46, 

 51-2; medical condemnation of, 30, 211, 

 509 ; in physics, 47, 49, 211, 214-5, 53 > m 

 mathematics, 47, 211, 344, 355, 503, 505, 

 509 ; in biology, 49-50, 345, 509 ; Darwin's 

 use of, 212-3 ; when necessary, 509 



Deductions, from fact of immunity, 257-8 



Dendy, Miss, on fertility of the feeble-minded, 



475 



Desire, emotion of, 373-4 



Deterioration, physical, 446 et seq. ; cure of, 449 



Determinants, 109 



Determiners, 164 



Development, method of, 23 ; of human 

 beings, 26-6 ; periods of slow and rapid, 

 120-1 ; independent, 154, 160. 



Devotion, to truth, 41 ; to beliefs, 488 



Devotional faculty, 325 



Dexterities, physical and mental, 419 



Diets, human, 440 



Digitalis, hybrids of, 157 



Dimorphism, sexual, 142, 144, 188-9 



Diphtheria, antitoxic treatment of, 240, 248 ; 

 effects of sanitation on, 450 



Discrimination, 377 



Diseases, regarded as experiments, 39-40, 

 216, 261 ; evidence furnished by, against 

 mutation hypothesis, 199; in England, 

 224 ; selection by, 225 ; list of microbic, 

 227 ; frequency of, 227 ; air-borne, 228, 

 239, 272, 278, 451-3 ; contagious, 229, 

 270, 450-1 ; earth-borne, 229, 274-5, 453 ; 

 insect-borne, 229, 271-2, 451 ; water-borne, 

 228, 274, 451 ; general, 230, 239 ; cause of 

 duration, 233-4 ; spread of, 236 ; epidemic 

 and endemic, 257, 275, 277, 279, 452 ; as 

 material for study of heredity, 261 ; resist- 

 ance of human races to, 263, of lower 

 animals, 275-6 ; evolution of, 266 et seq. 

 extinction of, 268 ; places of origin, 269 ; 

 migration of, 270-1 ; antiquity of, 269, 275 ; 

 conditions of prevalence, 275 ; invasion of 

 Western Hemisphere, 278^^.; as empire- 

 builders, 281 et seq. 



Disuse, as criterion of nature of growth, 7 ; 

 alleged as cause of retrogression, 108 



Dogs, deterioration in India, 84, 98 ; dis- 

 temper of, 275 ; crossing of large and small 

 breeds, 198 



Dominance, 153 ; imperfect, 155; of recessive 

 characters, 155 ; influenced by sex, 156 ; by 

 environment, 156 ; by race, 157 ; by idio- 

 syncrasy, 157 ; a phenomenon of sexual re- 

 production, 192 



Dominants, pure, impure, and extracted, 153, 

 !58 



Donkin, Dr H. B., on cirrhosis of liver, 295 



Dow, General Neal, on prohibition in 

 Maine, 463-4 



Dreams, 416 et seq. 



Drelincourt, on speculations about sex, 199 



Drift racial, caused by environment, 92 



Drinkers, the three classes of, 285, 286 

 Dyer, Sir W. Thiselton, on latency in a 

 natural species, 176 ; method of work, 185 



EARTH, shape of, 489 et seq. 



Education, and alcohol, 312 ; importance of, 

 477; in early life, 478-9; in school-room, 

 479-80 ; of young adults, 481 et seq. 



Educability, 398, 428 



Efficiency, 422 



Egypt, disease in, 269 ; intemperance in, 300, 

 459 



Ehrlich, hypothesis of immunity, 251 et seq. 



Embryo, prototypes of, 27 ; adaptations of, 

 119 



Emotions, acquired, 410 



Enumeration, simple, 54, 342-3, 509 



Epidemic and endemic diseases, 272, 452 



Error, sources of, 36 



Esquimaux, effects of vaccination on, 239 



Essayists in biology 184-5 



Europe, use of alcohol in, 299 



Evidence, when admissible, 35 ; neglect of, 

 59. 136 



Evolution, universal belief in, 4; recapitula- 

 tion of, 24 ; theories of, 59-62, 258 ; of 

 toxins, 88 et seq. ; of human races, 180 ; 

 against disease, 224-5 against alcohol, 297 



Ewart, Prof. J. Cossar, on causation of varia- 

 tions, 81-2, 85 ; on retrogression, 112 ; on 

 horse-zebra hybrid, 156 



Exact methods of inquiry, 34 etseq. \ sciences, 



36, 211 



Exclusive inheritance, 151 



Exodus, book of, on leprosy, 269 



Experience, stored in mind, 377 



Experiment, object of, 33 ; two ways of using, 

 43; scope in biology, 45, 50, 51, 510; 

 failure of, 44-5, 81-5, 87-91, 98-9, 171-3, 184, 

 204-5, 22I > 264, 409; as cause of contro- 

 versy, 45 



Experimental, sciences, 36, 502 ; evidence in 

 favour of Lamarckian doctrine, 73 ; school, 

 30-1, 184 



Explanation, nature of, 349 



Extracted dominants and recessives, 158 



Eye-colour, reproduction of, 145-6, 149, 174, 

 178, 428 et seq. 



Eyes, retrogression of, 123, 223 ; protected and 

 unprotected, 418 



FACTS, admissible, 32 ; patent and obscured, 

 33 ; scientific value of, 38, 480 ; teaching of, 

 480 



Factors, colour-, 164 



Faith, 488 



Family life, 380 



Fashion, influence of, 204, 292, 386 



Feeble-mindedness, 425, 465^^^. 



Female characters, reproduced by male, 114 



Fe"re", on alcoholized eggs, 264 



Fertility, biometric investigation of, 137-8, 

 430-1 ; evolution of, 137-8 ; of the insane, 

 475 



Fertilization, not essential condition of repro- 

 duction, 2, 142 



