INDEX 



543 



Individual, derivation from ovum, 5-6 



Induction, nature of, 42 



Inertia, mental, 493 



Insanity, the two kinds, 465 ; increase of, 

 471 ; causation of, 472-3 



Instinct, definition of, 374; human, 374-5, 

 383; imitated by acquirements, 400-1, 

 410; extended by acquirements, 422; dis- 

 tinguished from acquirements, 423 ; modi- 

 fied by acquirements, 423-4 ; for food, 440 ; 

 to think, 403, 478 



Intelligence, and fertility, 138, 478 ; defined, 

 377 ; measure of, 378 ; distinguished from 

 reason, 378 ; substituted for instinct, 380 

 et seq. ; adaptiveness of, 398, 478 ; Pearson 

 on, 431 ; relation to size of brain, 434 ; of 

 adult compared with that of child, 491 



Isolation, physiological, 143, 178, 181 



Italy, drinking in, 300-1 



JAMES, Prof. W., on science, 351, 360; on 

 Idealism, 336 ; on separateness of mind 

 and body, 361 ; on memory, 395 



Japan, social and intellectual changes in, 

 445, 497 ; tuberculosis in, 454 



Jealousy, instinct of, 424 



Jennings, Mr H. S., on paramoecium, 94 



Jevons, on framing of hypotheses, 42 ; on the 

 Newtonian method, 52 



Jews, ancient intemperance of, 299; modern 

 sobriety, 301 ; mental peculiarities of, 428 ; 

 effects of urban life on, 448 



K 



KANT, on mind, 335 



Kemp, Rev. D., on drinking in West Africa, 



33-4 



Kepler, on planetary motion, 43, 48 

 Kindergarten system, 481 

 Kingsley, Miss M., on malaria, 235; on 



drinking in West Africa, 303 

 Knowledge, sources of, 338 ; traditional, 381 ; 



useful, 478 



LABOUR, 479 ; laborious mental training, 479 

 Laboratory methods, when useful, 33, 35 ; 



scope in physics and biology, 49 

 Lake dwellers, use of alcohol by, 299 

 Lamarckian hypothesis of evolution, n, 61, 

 62, 76 ; controversy, 15-6 ; strongest evi- 

 dence against, 73 ; applied to disease, 259 

 Landois and Stirling, on ciliary action, 369 

 Lankester, Sir E. Ray, on retrogression, 22; 

 method of work, 185 ; on alcohol, 297 ; on 

 size of brain and intelligence, 434 ; on im- 

 beciles, 469-70 



Latency, distinguished from retrogression, 

 113, 115; temporary, 113; permanent, 114; 

 of sexual traits, 145, 159, 195 ; of Mendelian 

 traits, 160 et seq. ; of eye-colour, 174 ; Dar- 

 win on, 177 ; de Vries on, 177 ; occurs only in 

 artificial varieties, 176 



Latent characters, alternation of, 115-6; 

 common in artificial varieties, 161 et seq. ; 

 absent in natural varieties, 275 et seq. 



Law, natural, definition of, 47, 348 ; of 

 Ancestral Inheritance, 126 et seq. ; of filial 

 regression, 134 ; laws of heredity, 213 



Laws, against excessive drinking, 300, 305, 

 306, 458 et seq., 465 



Leprosy, antiquity of, 269 



Lewes, idea of evolution, n ; on intelligence, 

 406 



Life insurance and alcohol, 287, 296 



Linnaeus, scientific method, 511 



Lobster, lack of memory, 407 



Local option, 462, 464 



Lock, Mr R. H., on experiment, 31 ; mulat- 

 tos, 174 ; on study of human species, 180 ; 

 on claims of Mendelians, 188 



Locomotion, power of, effects on number of 

 varieties, 202 



Logic, Port Royal, 42 



Love, sexual and parental, 386 



Lubbock, on wasps, 418 



Lunacy, 466 et seq. , 471 



Lycurgus, punishment of drinkers by, 300 



M 



MACAULAY, on scientific method, 42 



M'Gregor, Sir W., on drinking in West 

 Africa, 302 



Mach, on scientific facts, 47 



Macpherson, Dr J., on increase of insanity, 

 47i 



Malaria, in pigeons, 81 ; an insect-borne 

 disease, 229 ; duration of, 234 ; racial re- 

 sistance to, 235, 309 ; migrations of, 271 ; 

 evolution against, 309 



Male characters, alternation with female 

 traits, 145 et seq. ; reproduced by female, 

 113. 165 



Man, crossed races of, 173 et seq. ; neglect of, 

 by biologists, 216, 218 ; place of origin, 269 ; 

 helplessness at birth, 381 ; differences be- 

 tween savage and civilized, ancient and 

 modern, 397 ; distinction from lower ani- 

 mals, 404; mental differences between 

 individuals, 426 et seq. 



Manipulation, association with brain, 396 



Maoris, mental traits of, 398 ; social state, 

 427 ; and alcohol, 464 



Maspero, on intemperance in Ancient Egypt, 

 300 



Maternal, impressions, 75, 76 ; love, 378, 386 



Mathematics, not an experimental science, 

 36 ; method of, 343 et seq., 503, 509, 517 



Mathematical knowledge, factors of, 422 



Matter, meaning of term, 324, 354; in 

 motion, 362 



Mauritius, invasion of malaria, 271 



Medical men, and deduction, 30, 509 ; Royal 

 Commission on, 74 ; belief in Lamarc- 

 kianism, 75, 255, 443 ; belief in direct 

 action of environment on germ-plasm, 81, 

 84, 264, 448 ; on Jewish mothers, 448 ; 

 evidence before Royal Commissions, 474 ; 

 study of heredity, 74 



Medical statistics, 81, 84, 264; certificates of 

 death, 295 ; education, 482 



