CONTENTS. 



PAGES 



Preface v 



1. The Relation of Physiology to Physics and 



Chemistry 1-19 



2. The Place of Biology in Human Knowledge 



and Endeavour 20-53 



3. The New Physiology 54-80 



4. The Relation of Physiology to Medicine . 81-102 



5. The Theory of Development by Natural 



Selection 103-135 



6. Are Physical, Biological, and Psychological 



Categories Irreducible ? . 136-156 



vn 



