352 



Index 



Germ nuclei, 21 



individuality of, 139, 140 

 Germplasm, in nucleus, 127 



Theory of Weismann, 127, 227 

 Germplasm vs. Somaplasm, 126, 127 

 "Germ track," diagram of, 126, 149 

 Germinal Bases of Mind, 36 

 Germinal Continuity, 125 

 Glandular secretions, effects of, 224 

 Glaucoma, 69, 118 

 Goddard, feeble-mindedness inherited, 



Goldschmidt, sex determination, 167 



sex hormones, 167 

 Gonia, 148 

 Grafts, not modified by stock, 230 



231 



Great men, in crises, 317 



Greece, decay of, 322, 2> 2 i 



Greeks, ancient, 276, 277 



Growth period, 148 



Gudernatsch, effects of food on tad- 

 poles, 221 



Guinea-pigs, recombinations of char- 

 acters, 258, 259 

 transplanted ovaries, 231, 232, 233 

 •-Guthrie, transplanted ovaries, 231 



Guyer, on chromosomes of man, 161 



Gynandromorphs, 167 



Gypsy moth, sex determination, 167 



Habits, definition, 238 



good and bad, 238, 312 

 Haeckel, plastidules, 129 

 Haemophila, 68, 118, 183 

 Hair, color, 116, 114, 119 



form, 116 



white forelock, 119 

 Half castes, of Australia, 284 



of New Zealand, 284 

 Haploid number of chromosomes, 



156 

 Hardship, educational value of, 239, 



317 

 Harris, induction effects of poor soil, 



235 

 Harrison, on transplanted limbs, 226 



graft of tadpoles, 230, 231 

 Harvey, epigram, 6 



epigenesis, 58 

 Hatschek, cleavage and gastrula- 

 tion of Amphioxus, 22 



Hereditary lines, interwoven, 294, 324 

 Hereditary Resemblances, 65 



Differences, 72 

 Heredity, and memory, 235 



and variation, 65, 75 



confused ideas of, 123 



definition of, 132 



mechanism of, 131, 133, 168 



more potent than environment, 

 296 



possible improvements, 325 



theories of, 133 



share of egg and sperm in, 194 



usually unchanged by environ- 

 ment, 237, 303 

 Heredity and Development, 132 

 Heredity, Environment, Training, 



241 

 Hering, Organic memory, 45 

 Heritage, definition of, 132 

 Hermaphrodites, 166 

 Hertwtg, O., discovery of fertiliza- 

 tion, 133 



human ovum, 9 



idioblasts, 129 



influence on germ cells of X- 

 rays, radium, chemicals, drug 

 habit. 210, 212 

 Hertwig, R., modification of sex ra- 

 tio, 165 

 Heterozygosis, 261 

 Heterozygotes, 83, 92, 95 

 Hippocrates, 124 

 Homo sapiens, 270, 274, 281 



neanderthalensis, 271 

 Homozygotes, 83, 92, 95 

 "Homunculus," 57 

 Hoppe, Effect of alcohol on germ 



cells, 212 

 Hormones, effects of, 224 

 Hoy and Muller, Chromosomes of 



man, 163 

 Human embryo, development, 27, 28, 



30 

 Human evolution, Control of, 275 



slow, 296 

 Human faculties, definition, 238 

 Human Heredity, no improvement 

 in, 276 



no pure lines, 115, 288 

 Human oosperm, early development, 

 27, 28, 30 



