FOREWORD vii 



of growth. Examination of them should lead to a mutually stimulating 

 outlook in the future study of both normal and abnormal growth (Chap- 

 ter IX). 



The last chapter of this book rounds out the work that has gone 

 before. Chemical syntheses, metabolic reactions, differentiation and 

 organization at the molecular and cellular levels must all be regulated 

 so that growth may be a coordinated series of events. Our knowledge 

 of these regulatory mechanisms stems largely from studies on the 

 adrenal gland. This pillar in the structure which the book attempts to 

 blueprint centers in the concluding chapter, "The Adrenal Gland, a 

 Regulatory Factor." 



This book is an outgrowth of a conference on "The Chemistry and 

 Physiology of Growth" that was held in Princeton in September 1946 

 in celebration of the Bicentennial of Princeton University. Since the 

 conference, the authors have had the opportunity to change their papers 

 in the light of comments made then, or to comment on the work of 

 others. Thanks are here extended to the many persons whose work made 

 the conference and this book possible, and special thanks are due to the 

 authors of these contributions for their generous help throughout. 



ARTHUR K. PARPART 



Princeton University 

 January IQ48 



