544 



THE LAWS OF HEREDITY 



Memories, concentrated, 396 



Memory, importance of, 325, 330, 338, 377, 

 380 ; defined, 377, 379, 394, 478 ; evolution 

 of, 380, 394, 405 ; neglected study of, 3895; 

 superiority in youth, 394; systems for im- 

 proving, 395 ; organ of, 396 ; conscious and 

 unconscious, 399 ; range of, 404 ; variations 

 of, 404, 422 ; in Crustacea, 407 ; in wasps, 

 418 ; abolished in dreams, 416 ; bearing in 

 mind, 418 ; distinguished from "memories," 

 421 ;fdefective in the feeble-minded, 425,465 ; 

 instinct to play with contents of, 403, 478 



Mendel, experiments on peas, 152, 158 



Mendelian hypothesis, chief points of, 154- 

 158 ; exceptions to, 159 ; central doctrine 

 of, 154 ; disproof of, 160 et seq. ; propor- 

 tions, 153, 158, 167 ; exceptions to propor- 

 tion, 158; inheritance, right interpretation 

 of, 163, 165, 167 ; inheritance of mutations, 

 169 ; traits of poultry, 172 ; of peas, 153 ; 

 sexual and Mendelian traits compared, 

 189-91 ; Mendelian inheritance a human 

 creation, 192 ; deductive inference of con- 

 sequences, 193 



Mendelism, not tested by experiment, 184 ; 

 concerned only with problems of sex, 188 ; 

 and disease, 280 ; and science, 510 



Mental traits, co-adaptation of, 388 et seq. 



training, importance of, 435 ; of child, 



401, 478 ; of young adults, 481 et seq. 



Mercier, Dr C. , on transmission of acquire- 

 ments, 74; on craving for alcohol, 290; 

 on separateness of mind and body, 361 



Method, of development, 22, 24 ; of science, 

 42, 185,345, 3Si, tf&etseq. 



Methods, exact, 34, 35, 184; experimental 

 and biometric, 140 



Metzger, experiments on maize, 83 



Mice, crossed varieties of, 162, 163 



Microbes, variations of, 87 et seq. ; cause of 

 disease, 227 ; evolution of, 88, 266 ; our 

 power of banishing, 450 



Microbic diseases, effects of sanitation, 450 



Middle Ages, physicians of, 269 ; social state 

 of, 497 



Migrations of negroes, 265 ; of human races, 

 181, 270 ; of disease, 270 etseq. 



Mill, John Stuart, on deductive method, 48, 

 213-5, 502, 514 ; on the statistical method, 

 140 ; on matter, 335 ; on knowledge, 343 ; 

 on the use of hypotheses, 512 ; on con- 

 troversy, 512-3 



Millais, Sir E., on breeding of Basset hounds, 

 126 



Millardet, on false hybrids, 159 



Mind, uniqueness of, 325 ; alleged super- 

 natural origin of, 325 ; not comparable with 

 matter, 327 et seq. ; growth of in infant, 

 329 et seq. ; relation to body, 362 ; the work 

 of the brain, 362 ; relation to expenditure 

 of energy, 363-4 ; evolution of, 364 ; a pro- 

 duct of evolution, 369 ; but not a direct 

 product, 365 ; association with nervous 

 tissue, 367 ; utility of, 367 ; beginnings of, 

 368-9, 378, 393 ; a product of Natural 

 Selection, 368 ; alleged universal presence 

 of, 368 ; order of evolution, 370, 387, 393, 

 409; of man, 374 et seq., 377, 426, 444 et 

 seq. ; bearing in mind, 418 ; development 

 of, 419 ; growth compared with that of 



body, 420, 426; effects of training on, 

 444 



Minds, of other people, 333 et seq. ; closed 

 and open, 492 et seq. 



Miracle, 59, 65, 90, 325 



Missionaries and disease, 280 ; and alcohol, 

 302 et seq. 



Mitchell, Sir A., on dreams, 417 



Modesty, 423 



Modifications, 15, 21 ; distinguished from 

 variations, 79 



Mohammedans and alcohol, 460 



Monks, cranial capacity of, 435 



Morality, 423 ; effects on of temperance legis- 

 lation, 462 ; of imbeciles, 466 



Morgan, Prof. Lloyd, on use acquirements, 

 72 ; on plasticity, 408 



Prof. T. H., on experimentation, 30-1 ; 



on latency of Mendelian traits, 160; on 

 evolution and adaptation, 391 



Morocco, social state of, 497 



Morrison, Rev. W. D., on crime, 495 



Mosaic inheritance, 155 



Mothers, Jewish, 448 



Mulatto, skin colour, 174 



Mule, 157 



Multicellular organisms, i 



Murray, David Christie, on crime, 494 



Mutilations, alleged transition of, 75 



Mutation, meaning of term, 170 



Mutations, 22, 151 ; alleged stability of, 150, 

 169-70, 171, 179, 183 ; human, 175, 179, 

 181 ; in wild nature, 179; of O. lamarckiana, 

 179 ; inutility of, 179 ; reproduced in the 

 mode of sexual traits, 189 et seq. ; blending 

 of, 195-6 ; retrogression of, 171, 196 



Mutation hypothesis, 150, 169 ; grounds for 

 maintaining, 175-6 ; grounds for rejecting, 

 181 et seq. , 199 ; not tested by experiment, 

 184 ; inference of consequences from, 194 ; 

 and reflexes, 373 ; and mind, 388 ; and 

 palaeontology, 392 



Mutationists and biometricians, 150 



N 



NAMES, importance of, 18 



Narcissus, from cross between jonquil and 



daffodil, 156 



Narcotics, immediate and remote effects, 306 

 Natural Selection, theory, contrasted with 



Lamarckian hypothesis, 66 et seq. ; objec- 

 tions to, 107, 185, 391 

 Natural varieties, blending of when crossed, 



176 ; lack of latent traits, 176 

 Nature and Nurture, 421, 429 

 Naudin, on crossed artificial varieties, 177 

 Necessary truth, 47, 346, 349 

 Negro, teeth of, 224 ; and malaria, 234 ; and 



alcohol, 302 et seq. ; migrations of, 265 

 Nervous tissue, association with mind, 367 ; 



evolution of, 370 

 Neutralization of toxins, hypothesis of, 243 



et seq. 

 New Zealand, aborigines of, 427 ; temperance 



legislation in, 464 

 Newton, on orbit of moon, 43 ; scientific 



method, 52 ; on gravitation, 352 ; compared 



with Darwin, 505-6 



