Contents 



Introduction P^g^ ^^ 



1. Old Age and Natural Death (1946) 17 



2. An Unsolved Problem of Biology (1952) 44 



3. A Note on ^The Scientific Method^ (1949) 71 



4. A Commentary on Lamarckism (1953) 79 



5. The Pattern of Organic Growth and Trans- 

 formation (1954) 108 



6. 'The Imperfections of Man (1955) 122 



7. Tradition: The Evidence of Biology (1953) 134 



8. The Uniqueness of the Individual (1956) 143 

 Index 186 



7536. 



