ARGUMENT. 



I. Introductory. — 2. Writers on Longevity and General Sources 

 of Information. — A. Longevity in Organisms generally. 3. Lon- 

 gevity defined. — 4. The various kinds of Longevity. 5. Iniierent 

 Death. — 6. Elements of the Life Period. — 7. High Individuation 

 favours Longevity. — 8. Small Expenditure favours Longevity. — 

 9. Why Longevity is thus influenced. — 10. Inductive. — 11. Other 

 Relations of Longevity. — 12. Some Experimental Evidence. — 13. 

 Summary. — B. Longevity of Man. 14. Preliminary. — 15. Sources 

 of Information as to Human Longevity. — 16. Statements as tp 

 the Duration of Human Life. — 17. General Conclusions from the 

 foregoing Statements and Tables. — 18. Interpretation of the Law. 

 — 19. Duration of Life in Past Time. — 20. The Influence of 

 various States of Civilization. — 21. Abnormal Longevity in Man. 



