526 



INDEX 



reflexes, 55 i 



tropisms, 54 



Logic, as test of truth, 451 

 LOLIGO, symmetry of egg, 169 ! 

 Longevity inherited, 202, 203 

 Luxury, cause of infertility, 

 436, 437 



in education, 475, 476 , 



MACFAHLAXE, on Dionaea, 56,1 

 499 



Me CLUXG, on sex determina- 

 tion, 141, 166, 499 



MAC DOUGALL, influence of 

 chemicals on ovules, 311, 499 



MAC DOWELL, size in rabbits, 

 285-287, 499 



Me GREGOR, Restoration of 

 Pithecanthropus skull, 397 



Male babies, greater mortality, 

 150 



MALTHUS, theory of, 420 



Man, controls destiny, 399 

 dominant races of, 401 

 evolution of, 396-403 

 extermination of, 401, 402 

 extinct types of, 396, 897 

 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, 402 



Marriage, age of, 420, 431 

 selection, 426-428 



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, 297 

 life, 463 



MECHAXISM OF DEVELOPMENT, 

 179 



MECHANISM OF HEREDITY, 151 

 Mechanistic hypothesis, 479 

 Mediocrity, tendency to, 218 

 MEISCHER, On stereoisomeres of 



albumin, 155 

 MEMORY, 56-59, 78 

 MENDEL, abbot of Brlinn, 224 

 dominant and recessive 



characters, 227-228 

 dominant: recessive ratios, 



228-245 

 experiments on peas, 193, 



224, 226, 499 

 inheritance formulae, 246, 



247 



inheritance units, 255 

 method of work, 225 

 neglect of discoveries, 225 

 purity of germ cells, 234, 



235 

 MEXDELIAN ASSOCIATION AND 



DISSOCIATION, 386-388 

 Mendelian factors and chro- 

 mosomes, 165, 166, 262, 

 263, 264, 265 

 MENDELIAX INHERITANCE IN 



MAX, 288-296 

 Table of, 291-296 

 MEXDELIAN PRINCIPLES, 250 

 DOMINANCE, 251 

 MODIFICATIONS AND EXTEN- 

 SIONS, 252 

 SEGREGATION, 251 



UxiT CHARACTERS, 250 



Mendelian ratios, simple, 228, 



230, 231, 232-V,m 

 "back cross," 237, 238 

 monohybrid, 340, 244 

 dihybrid, 239, $41, 242, 244 

 trihybrid, 243, 244, 245 

 dominant-recessive, 233 

 departures from, 280, 281, 

 282 



MEXDELISM, 224-251, 297 



MEXDELSSOHN, reactions of 

 Paramecium, 53 



Meniere's disease, 295 



Mentality, influence of educa- 

 tion,' 303 



