540 



INDEX 



possible improvements, 506 

 theories of, 111 

 usually unchanged by en- 

 vironment, 450, 454-463 

 Heredity and Development, 



108-110 

 Heredity asd Environment 



90, 91, 310-314 

 Heredity, Environment, 



Training, 366-368 

 Herixg, Organic memory, 64 

 Heritage, definition of, 109 

 Hertwig, O., discovery of ferti- 

 lization, 113 

 human ovum, 11 

 idioblasts, 106 

 influence on germ cells of 

 X-ravs, radium, chemi- 

 cals/drug habit, 319-321 

 Hertwig, R., modification of 



sex ratio, 154-157 

 Heterozygosis, 396-399 

 Heterozvgotes, 234, 236, 247, 



249, 250 

 Hindu Dwarfs, 305 

 Hippocrates, 97 

 Homo sapiens, 408, 413, 428 



neanderthalexsis, 409 

 Homozygotes, 234, 236, 247-250 

 "Homunculus," 85 

 Hoppe, Effect of alcohol on 



germ cells, 320 

 Human embrvo, development, 



36, 38 

 Human evolution, Control of, 

 416 

 slow, 455 

 Human faculties, definition, 363 

 Human Heredity, no improve- 

 ment in, 417-423 

 Human oosperm, early develop- 

 ment, 34 

 ovum, 11, 14 

 spermatozoa, 14 

 Humidity, influence on muta- 

 tion, 318 



Huntington's Chorea, 303 

 Huxley, Evolution and Ethics, 



370 

 Hybrid races, quality of, 434 

 Hybridization, human, 432-434 

 Hybrids, increased vigor, 396 

 Hvpertrophied heart, not in- 

 herited, 347, 349 

 Hypophysis, effects on de- 

 velopment, 339 

 Hypotrichosis, 302 

 Hysteria, 212, 303 • 



Ideals, individual and social, 



428-430 

 Identity, sense of, 80 

 "Idioblasts" of Hertwig, 106 

 Idioplasm, of Nageli, 103 

 Immigration, 419, 434, 435 



laws, 437 

 Immunity, transmission of, 296 

 Impulses, conflicting, 481 

 Inbreeding, 430-432 

 Individual and Race, 498 



minor unit, 504, 505 

 Individual Characters, 202 



Morphological, 202 



Physiological, 208 



Psychological, 210 



Teratological, 205 

 Individuals and their charac- 

 ters, 197 

 ''Induction," effect of colored 

 soil, 358 



poor soil, cold, alcohol, 357- 

 358 



not inherited, 359-360 

 Inequality of all men, 464 

 Infancy, prolonged in man, 362, 



472 

 Infertility, causes of, 452 

 Inheritance, "alternative," 214 



"blending,'' 214 



of baldness, 209 



cell characters, 205 



dimples, 203 



