270 



INDEX 



Centenarians, 23-26, 64 



Cephalic index, 175 



Cephalisation, 68 



Chances of death, 79-101 



Changes in expectation of life, 82-94 



Chick, 59-61, 76 



duration of life of, 63 

 Child, C. M;., 34-36, 39, 43, 44, 260 

 Child welfare, 112 

 Chironomus, 39 

 Circulatory system, 107, 108, 111, 



118, 119 

 Classification, biological, of causes 

 of death, 104 

 international, of 

 causes of death, 103 

 Clocks, analogy with living things, 



150, 151, 198 

 Clonal reproduction, 37, 74 

 Coefficient of correlation, 168 

 Coelenterates, 62 

 Cohnheim, J., 44, 260 

 CoUis, B. L., 216, 260 

 Conjugation, 30-33, 71, 73 

 Conklin, E. G., 29, 44, 260 

 Controllable causes of death, 230, 233 

 Correlation coefficient, 168 

 Correlations in duration of life, 168- 



177 

 Crossett, 239, 241 

 Croup, 230, 231 

 Crum, F. S., 184, 260 

 Culture of tissues in vitro, 58-78 

 Curve, mortality, graduation of, 94- 

 101 

 specific death rate, 114, 116 

 Curves, logarithmic plotting of, 114 

 Cyclops, 39 

 Cytomorphosis, 28 

 Cytoplasm, 29, 44 



Darwin, L., 257 

 Davis, W. H., 113 

 Dawson, J. A., 73, 260 



Dawson, M. M., 82, 260 

 Death, appearance of in evolution, 42 

 biological classification of 



causes of, 104-137 

 chances of, 79-101 

 causes of, 102-137 

 the Marksman, 96-98 

 theories of, 43-50 

 Death birth ratio, 243-246 

 Death-rate, selective, 177-185 

 Death-rates, crude, 112 



specific, 112-137 

 DeDecker, A., 216, 267 

 Deer, 68 



Delage, Y., 45, 260 

 Delcourt, A., 200, 260 

 Descent, method of, 40-42 

 Diarrhcea, 110, 112 

 Differentiation, 45-47, 67, 75 

 Diphtheria, 230, 231, 235, 237 

 Diseases, preventability of, 162 

 Doflein, F., 33, 260 

 Dog fish, 39 



Domestic fowl, duration of life of, 63 

 Donaldson, H. H., 29, 260 

 Drosophila melanogaster, 186-202, 

 208-211, 214, 222, 225, 226, 253, 

 254 

 Dublin, L. I., 82, 113, 260, 261 

 du Nofly, P. L., 77 

 Duration of life, correlation in, 168- 

 177 

 experimental study 



of, 186-222 

 influence of activi- 

 ty on, 211-217 

 influence of tem- 

 perature on, 208- 

 217 

 inheritance of, 94, 



160-185 

 in man, 79-94, 150- 

 185 



