396 



Index 



Endoplasm, i, 277 



Energy, formative and regenera- 

 tive, i, 11; of modern physics, 

 76; and matter, 141; conception 

 of, 320; of contraction, ii, 63; 

 and substance, 337; and power, 

 force, work, 342; surface, 344 



Entelechy, ii, 149 



Environmental influence, ii, 244 



Enzymes, digestive, comparative 

 chemistry of, i, 104; facilitate 

 transformation, ii, 81 



Epicurus, i, 3 



Epithelium, and internal secre- 

 tions, ii, 135 



Eppinger, H., ii, 133 



Equilibrium, general notion of, i, 

 17; physical chemistry concep- 

 tion of, 216 



Essences, ii, 288 



Esterly, C. O., ii, 208 



Evidence, direct and indirect, of 

 mechanism of heredity, i, 325; 

 favorable to chromatin as hered- 

 itary substance, 326; visible and 

 invisible, ii, 56; picking out of, 

 ii, 263 



Evolution, i, 291, ii, 241 



Evolutions, four simultaneous, i, 

 321 



Eudendrium, i, 67 



Eugenics, i, 305; and fatalism, ii, 

 89 



Excessiveness, of instinctive activ- 

 ity, ii, 259; of sex impulse, 265 



Excitability, threshold of, ii, 165; 

 selective, 165 



Excitor, ii, 147 



Experience, ii, 305; subjective and 

 objective, 285; causes of, un- 

 known, 303 



Experimentation, limitations of, ii, 

 212; laboratory, 279 



Explanation, spurious type of, ii, 

 81; causal, 146, 240; of trop- 

 isms, 190 



Expression of emotion, ii, 264 



Factorial hypothesis in heredity, i, 



21 



Factors, in heredity, i, 42, 306 

 Facts, neglect of, by elementalists, 



ii, 157; matters of, 299 



Falta, W., ii, 134 



Fatalism, ii, 89 



Fatigue, and sugar in blood, ii, 

 132; and blood pressure, 181 



Fear, and adrenin in blood, ii, 

 132; with physical and psvchical 

 life, 183 



Feeling, intellect, will, ii, 217 



Felidas, i, 96 



Ferns, ii, 99 



Fertilization, hybrid, 5, 344 



Fielde, A., on odors in ants, i, 89 



Finalism, ii, 152 



Finch, house, ii, 260 



Fishes, sperm of different species, 

 i, 102; floating eggs and young 

 of, 213; mating habits of, ii, 265 



Flagella, of bacteria, 259; rela- 

 tion to nucleus, 328, 330; struc- 

 ture and origin of, 370 



Flat-worms, ii, 109 



Flavors, of animals and plants, i, 

 84 



Fluid, as phase of system, i, 216 



Foetus, i, 272 



Forbush, E. H., ii, 270 



Forces, antagonistic, ii, 127; con- 

 stitutively antagonistic, 134; 

 abuse of the term, 298 



Fore-foot, horse's, and man's hand, 

 ii, 224 



"Formative stuffs," i, 16; and in- 

 ternal secretions, ii, 142; of 

 Sachs, 147 



Formi-determination, cytoplasmic, 

 ii, 14 



Forsyth, Ruth, ii, 44 



Fossil wood, ii, 58 



Foster, Sir Michael, ii, 346 



Fragmentation, and analysis, ii, 

 236 



Freud, S., ii, 350 



Friedlander, B., ii, 103 



Frog, eggs of, i, 199; pigment 

 cells of, 339; sex determination 

 in, ii, 76; larva and thyroid of, 

 143; croaking of, 261 



Fruit flies, supposed connection 

 between mutations and chromo- 

 somes in, i, 354 



Fundamental, criterion of, ii, 201 



