CONTENTS 



CHAPTBR PAGE 



I. THE PROBLEM 17 



II. CONDITIONS OP CELLULAR IMMORTALITY 51 



III. THE CHANCES OP DEATH 79 



IV. THE CAUSES OP DEATH 102 



j 



V. EMBRYOLOGY AND HUMAN MORTALITY 138 



VI. THE INHERITANCE OP DURATION OP LIFE IN MAN 150 



VII. EXPERIMENTAL STUDIES ON THE DURATION OP LIFE 186 



VIII. NATURAL DEATH, PUBLIC HEALTH, AND THE POPULATION PROBLEM 223 



BIBLIOGRAPHY 259 



INDEX . 269 



