INDEX 



521 



serious, 426-428 



slight, 426 

 EUGENICS, 410-440 



contributory, 428-431 



declining birthrate, 431-440 



definition of, 412 



ideals, 412-419 



negative, 419-423 



only hope, 449 



positive, 423-428 



Problems in, 495 

 EUTHENICS, 352 

 Evolution, control of, 403, 404 



experimental, 305, 395 



progressive, 400 



promotion of, 403, 488, 491 



requires new characters, 

 388, 394, 395 



retrogressive, 400 

 EVOLUTION OF MAN, 396-403 



contemporary, 398 



control of, 403, 404 



future, 399, 400, 412 



intelligence in, 403, 



natural selection in, 402 



prehistoric, 398 

 Exogastrula, 824 

 Experience, factor in behavior, 

 464 



learning by, 65, 465 

 Experimental medicine, 5 

 EXPERIMENTAL STUDY OF IN- 

 HERITANCE, 222, 224 

 Eyes, development, 28 



color, 197, 291 



lacking, 325 



fused together, 325 



Facial features, inheritance of, 



197 



German type, 291 

 Hapsburg type, 291 

 Jewish type, 291 

 FACTORS OF DEVELOPMENT, 79-86 

 Factors, added in progressive 

 mutations, 394 



chemical comparisons, 394, 



395 



definition of, 101 

 differential, 264 

 distribution in maturation 



and fertilization, 262 

 dominant and recessive, not 



modified by union, 343 

 drop out in regressive mu- 

 tations, 394 



extrinsic and intrinsic, 85 

 for color developers, 256 

 of rabbits and mice, 259, 

 of sweet peas, 256, 257, 



258 



for pigment, 256 

 location in cell, 261, 262, 



263, 264 



Mendelian, 264, 265 

 multiple, 281-287 

 nature of, 260 

 no formation de novo, 395 

 origin of new, 394, 395 

 relations to characters, 255, 



256 



sex determining, 265 

 FAHLENBECK, noble families of 



Sweden, 436 

 FARADAY, 474 



Fat stains, effects on next gen- 

 eration, 350 



"Fate of part function of po- 

 sition," 333 

 of organization, 334 

 Fecundity, inherited, 204 

 Feeble-mindedness, 205, 206, 295 

 Feminist movement, 484 

 Fertility, of lower types, 411 

 FERTILIZATION, 15, 16, 107-110 



heterogeneous, 313 

 "Fewer and better children," 



439 

 FISCHER, mutations of insects, 



348, 497 



Fluctuations, 211, 212, 389 

 Food, influence on development 

 in tadpoles, canaries, bees, 

 326, 327 



