35° 



Index 



"Energies of Men," 315 

 Englemann, jS 

 English sparrow in U. S., 292 

 Engrammes, 235 



Environment, acting at sensitive per- 

 iod, 254 



definition, 208 



direct action on germ cells, 235, 



23S, 237 . 



and education, 242 



good and bad, 238-240, 317 



influence in producing new races, 

 252, 254 



influence on ontogeny, 206, 207 



influence on phylogeny, 206, 207 



larger influence on man, 237 



non-specific, 169 



possible inprovements, 324 



social institutions and, 206 

 Epidermolysis, 117 

 Epigenesis, 57, 58, 175, 199. 306 

 Epilepsy, 71, 117 

 Equality of Man, 206, 304 

 Equatorial plate, 16, 17 

 Equation division, 156 

 Ethical Obligation, 322 

 Ethics, 325 



Eugenicist, methods of, 283 

 Eugenical predictions uncertain, 287 



rules as to defects, recessive, 286 

 serious, 289 

 slight, 2S9 

 Eugenics, 279 



contributory, 290 



declining birthrate, 291 



definition of, 280 



ideals, 281 



negative, 285 



only hope, 304 



positive, 287 

 Euthenics, 237 



Evans, chromosomes of man, 162 

 Evolution, control of, 275 



experimental, 207, 270 



progressive, 273 



promotion of, 275, 325 



requires new characters, 262, 266, 

 268 



retrogressive, 273 

 Evolution of Man, 270 



contemporary, 272 



control of, 275 



future, 272, 276 



intelligence in, 275 



natural selection in, 275 



prehistoric, 270 

 Exogastrula, 221 

 Experience, factor in behavior, 312 



learning by, 49, 312 

 Experimental evolution, 270 



medicine, 4 

 Experimental, Study of Inheri- 

 tance, 81 

 "Extracted" Dominants or Reces- 

 sive s, 85 

 Eyes, development, 23 



color, 66, 116 



lacking, 221 



fused together, 222 



Facial features, inheritance of, 66 



Hapsburg type, 117 

 Factors of development, 56-60 

 Factors, added in progressive muta- 

 tions, 270 



chemical comparisons, 100, 130, 

 270 



definition of, 99, 130 



differential, 100 



distribution in maturation and 

 fertilization, 178 



dominant and recessive, not 

 modified by union, 234 



drop out in regressive mutations, 

 268 



extrinsic and intrinsic, 60 



for color developers, 101 



of rabbits and mice, 102 



of sweet peas, 10 1, 103 



for pigment, 101 



lethal, 104, 185 



location in cell, 130, 176, 779 



Mendelian, 100, 178 



modifying, 102 



multiple, 101 



nature of, 101, 104, 130 



no formation dc novo, 270 



not undeveloped characters, 100 



origin of new, 269, 270 



relations to characters, 175 



sex determining, 164 

 Fahlenbeck, noble families of Swe- 

 den, 293 



