CONTENTS 



CBAPTBB PAQIB 



I. The Problem 17 



II. Conditions op Cellular Immortality 51 



III. The Chances op Death 79 



^^. The Causes op Death 102 



J)*^. Embrtoloqt and Human Mortality 138 



VI. The Inheritance op Duration op Life in Man 160 



VII. Experimental Studies on the Duration op Life 186 



VIII. Natural Death, Public Health, and the Population Problem 223 



Bibliography 259 



Index 269 



