PREFACE 



My aim in writing this book has been to prepare an inter- 

 mediate text which would cover the general field of physiologi- 

 cal chemistry in such a way as to give students a familiarity 

 with compounds important from a biochemical viewpoint, and 

 to acquaint them with the fundamental processes which go on 

 in the animal body. I have attempted to avoid confusing the 

 beginner with lengthy discussions of debated points, but to set 

 forth as clearly as possible the present status of our knowledge. 

 The material is so chosen that the book may be used for inter- 

 mediate classes, or for advanced work if supplemented by lec- 

 tures. 



The appended laboratory work has been drawn from the 

 manual in use in my classes for the last five years. Much of 

 the material has, of course, been drawn from other manuals. 



As the book is not intended to be an advanced text, the 

 micro methods for the analysis of urine have not been included. 



I wish to acknowledge suggestions and corrections in the 

 laboratory directions from various colleagues, particularly Dr. 

 F. B. Kingsbury. I wish also to express my thanks to Dr. W. 

 H. Hunter, who kindly volunteered to read the manuscript of 

 the theoretical portion. 



C. J. V. PETTIBONE. 



Minneapolis, Minn. 



