TABLE OF CONTENTS 



PAGE 



Preface vii 



CHAPTER 



I. Introduction 1 



II. Facts and Findings 20 



III. A Cross Section of Present-Day Biolog- 



ical Thought 48 



IV. Provocative Biological Theories ... 72 

 V. Outstanding Biological Work and Work- 

 ers 92 



Bibliography 124 



Index 147 



37SS4 



XI 



