3 68 



Index 



Embryonic differentiation, processes 



in, 203, 208 

 Embryos, double, 222, 223, 229 



dwarf, 224 



half and three quarter, 224-226 

 Endoderm, 23 



ENDOGENESIS AND EPIGENESIS, 58 

 "Energies of Men," 333 

 ENGLEMANN, 38 

 English sparrow in U. S., 309 

 Engrammes, 246 



Environment, acting at sensitive per- 

 iod, 266 



definition, 216 



direct action on germ cells, 246- 

 248 



and education, 252 



good and bad, 251-254, 335 



influence in producing new races, 

 264, 266 



influence on ontogeny, 214, 216 



influence o i phylogeny, 214, 280 



larger influence on man, 249 



non-specific, 172 



possible improvements, 343 



social institutions, 214 

 Epidermolysis, 117 

 Epigenesis, 57, 58, 177, 204, 324 

 Epilepsy, 71, 118 

 Equality of Man, 214, 322 

 Equatorial plate, 16, 17 

 Equation division, 157 

 ETHICAL OBLIGATION, 340 

 Ethics, 343 



Eugenicist, methods of, 299 

 Eugenical predictions uncertain, 305 



rules as to defects, recessive, 306 

 serious, 306 

 slight, 287, 306 

 EUGENICS, 295 



contributory, 307 



declining birthrate, 309 



definition of, 296 



ideals, 297, 298 



negative, 302 



only hope, 322 



positive, 305 



EUTHENICS, 249 



EVANS, chromosomes of man, 163 

 Evolution, control of, 291 



experimental, 215, 283 



progressive, 289 



promotion of, 292, 343 



requires new characters, 274, 280, 

 283 



retrogressive, 189 

 EVOLUTION OF MAN, 287, 288 



contemporary, 287 



control of, 291 



future, 289, 292 



intelligence in, 291 



natural selection in, 292 



prehistoric, 287 

 Exogastrula, 229 

 Experience, factor in behavior, 330 



learning by, 49, 329 

 Experimental evolution, 283 



medicine, 4 



EXPERIMENTAL, STUDY OF INHERI- 

 TANCE, 82 

 "Extracted" Dominants or Reces- 



sives, 86 

 Eyes, development, 23 



color, 66, 119 



lacking, 231 



fused together, 230 



Facial features, inheritance of, 66 



Hapsburg type, 119 

 FACTORS OF DEVELOPMENT, 56-60 

 Factors, added in progressive muta- 

 tions, 283 



chemical comparisons, 101, 130, 



28 3. 

 definition of, 100, 130 



differential, 101 



distribution in maturation and 



fertilization, 180 

 dominant and recessive, not 



modified by union, 243 

 drop out i-i regressive mutations, 



282 



extrinsic and intrinsic, 60 

 for color developers, 102 

 of rabbits and mice, 103 

 of sweet peas, 102, 104 

 for pigment, 102 

 lethal, 105, 190 

 location in cell, 130, 178, iSr 

 Mendelian, 101, 180 

 modifying, 103 

 multiple, 102 

 nature of, 101, 105, 130 

 no formation de novo, 283 

 not undeveloped characters, 101 

 origin of new, 282, 283 



