INDEX 



271 



Duration of life of domestic fowl, 63 



of parents and off- 

 spring, 155-157 

 role of bacteria in, 



43, 199-202 

 variation in, 21, 22, 



68, 80-82 

 Dysentery, 230, 231 



East, E. M., 195, 257, 261 

 Ebeling, A. H., 60, 61, 74, 76, 77, 78, 



260, 261 



Ectoderm, 138-149 

 Effects of public health work, 112, 



227-242 



Egypt, expectation of life in, 87-89 

 Elephant, longevity of, 22 

 Embryology and mortality, 138-149 

 Embryonic juice, 74 

 Endocrinal system, 107, 108, 112, 



133, 134 



Endoderm, 138-149 

 Endomixis, 30, 33, 71-73 

 Energy, 213-217 

 England, 106, 108-111, 139, 140, 235, 



244-246 



Enriques, P., 73, 261 

 Environment, 225, 226 

 Epidemic, influenza, 245 

 Erdman, R., 30, 261, 268 

 Eudorina elegans, 31, 73 

 Eugenics, 227 



Education Society, 257 

 Evolutionary progress in longevity, 



87-94 



Evolution of ectoderm, 141 

 of endoderm, 141 

 of mesoderm, 141 

 of workmanship of, 148 

 Excretory organs, 107, 108, 111, 126, 



127 



Exercise, 212, 213 

 Expectation of life, defined, 82 



changes in, 82-94 



Expectation of life, effect of selection 



on, 94 



hypothetical, 164 

 in ancient Egypt, 



87-89 

 in ancient Rome, 



90-92 



in Hispania and 

 Lusitania, 91- 

 92 

 in Roman 



Africa, 92-93 

 Experimental study of duration of 



life, 186-222 

 Eye color, 174, 175 



Fermat, 82 



Fertilizin, 57 



Fish, longevity of, 22 



Fisher, A., 101, 149, 184, 261 



Fisher, I., 161, 162, 165 



Fission, 32, 33, 35, 40, 41 



Fitting the mortality curve, 94-101 



Food requirements, 256 



Forsyth, C. H., 161, 164, 261 



Fowl, duration of life of, 63 



France, 244, 245, 251, 252 



Franco-Prussian war, 252 



Fraternal correlations, 171, 172, 175, 



176 



Friedenthal, H., 68, 69, 261 

 Friends' Provident association, 167 

 Frog, 52, 58, 59 



Galvani, 58 



Genealogy of Hyde family, 152 



Genetic variation, 190 



Germany, 235 



Germ cells, 37-42, 51-58 



layers, 138 



plasm, 227, 228 

 Given, D. H. C., 238, 261 

 Gland, pituitary, 220-222 

 Glands, puberty, 217-219 



