VI 



PREFACE 



of Honours Schools and researchers, it may be of some living and 

 historic interest to show how research bred in the mind, originated, 

 and developed. 



It is a pleasant duty to record my indebtedness to my colleague 

 Mr. Edward Whitley and to many others who have so ably col- 

 laborated in these inquiries. 



The remaining chapters are re- edited from my contributions to 

 " Recent Advances in Physiology " and " Furthfer Advances in 

 Physiology," edited by Dr. Leonard Hill, F.R.S., the former of 

 which is now out of print. 



BENJAMIN MOORE. 



LABORATORY OF BIOCHEMISTRY, 

 THE UNIVERSITY, 

 OXFORD. 



January 14, 1921. 



