viii GENERAL PREFACE 



It has been decided as a general scheme that the volumes 

 first issued shall deal with the pure chemistry of physiological 

 products and with certain general aspects of the subject. 

 Subsequent monographs will be devoted to such questions 

 as the chemistry of special tissues and particular aspects of 

 metabolism. So the series, if continued, will proceed from 

 physiological chemistry to what may be now more properly 

 termed chemical physiology. This will depend upon the 

 success which the first series achieves, and upon the divisions 

 of the subject which may be of interest at the time. 



R. H. A. P. 

 F. G. H. 



