536 



INDEX 



tropisms, 54 | 



Logic, as test of truth, 451 | 



LoLiGO, symmetry of egg, 169 \ 



Longevity inherited, 202, 203 I 

 Luxury, cause of infertility, 



436, 437 : 



in education, 475, 476 , 



Macfablane, on Dionaea, 56,1 



499 

 Mc Clung, on sex determina-i 



tion, 141, 166, 499 

 Mao Dougall, influence of 



chemicals on ovules, 311, 499 

 Mac Dowell, size in rabbits, 



385-287, 499 

 Mo Gkegok, Restoration of 



Pithecanthropus skull, 397 

 Male babies, greater mortality, 



150 

 Malthus, theory of, 430 

 Man, controls destiny, 399 



dominant races of, 401 



evolution of, 396-403 



extermination of, 401, 403 



extinct types of, 396, 397 



freer than animals, 465 



mongrel race, 425 



place in nature, 3 



prehistoric, 398 



races of, 400 



species of, 396, 397 



value of races of, 400 

 Maoris of New Zealand, 403 

 Marriage, age of, 430, 431 



selection, 436-428 

 Marsupials, 32 

 Massart, reactions of Spirilla, 



51 

 Materialism, 44 

 "Maternal impressions," 34 

 Matter and mind, 44 

 Maturation period, 135 



divisions, 135, 137 

 Maze, of heredity, 214, 397 



life, 463 

 Mechanism of Development, 



179 



Mechanism of Heredity, 151 



MecfiajQistie ^pothesi£^ 4i79 



Mediocrity, tendency to, 318 



Meisoher, On stereoisomeres of 

 albumin, 155 



Memory, 56-59, 78 



Mendel, abbot of Brunn, 324 

 dominant and recessive 



characters, 237-238 

 dominant : recessive ratios, 



338-345 

 experiments on peas, 193, 



224, 336, 499 

 inheritance formulae, 246, 



247 

 inheritance units, 255- 

 method of work, 235 

 neglect of discoveries, 335 

 purity of germ cells, 234, 

 235 



Mendelian Association and 

 Dissociation, 386-388 



Mendelian factors and chro- 

 mosomes, 165, 166, S6S, 

 S63, 364, 265 



Mendelian Inheritance in 

 Man, 288-396 

 Table of, 391-296 



Mendelian principles, 250 

 Dominance, 251 

 Modifications and exten- 

 sions, 252 

 Segregation, 351 

 Unit characters, 250 



Mendelian ratios, simple, 338, 

 230, SSI, 252-336 

 "back cross," 337, 338 

 monohybrid, S40, 244 

 dihybrid, 239, S4I, 343, 344 

 trihybrid, 343, 244, 2^5 

 dominant-recessive, 233 

 departures from, 280, 281, 

 283 



Mendelism, 224-251, 397 



Mendelssohn, reactions of 

 Paramecium, 53 



Meniere's disease, 395 



Mentality, influence of educa- 

 tion, 303 



