Vll 



the natural fruits of knowledge. This will be the leitmotif of this 

 book which contains an attempt to identify the missing link in 

 our knowledge and open alleys to its approach. 



Woods Hole, Massachusetts 

 July 19^6 



Albert Szent-Gyorgyi 



ACKNOWLEDGMENTS 



When letting this book go my thoughts wander gratefully to those who 

 supported my research and shared its risks, in the first place to my associates. 

 The Commonwealth Fund gave its generous help explicitly for the study of 

 energy transmission in spite of my warnings that they might be supporting a 

 gamble. Armour and Co. were my most generous supporters for many years 

 and so were the Heart Association, the Muscular Dystrophy Associations, the 

 Association for the Aid of Crippled Children, who all greatly helped the 

 development of the views presented here by not t>'ing down the author's mind 

 by strings attached to their grants. Much encouragement has been given lately 

 by the National Heart Institute through its Grant H 2042, and by the National 

 Science Foundation as well as the United Cerebral Palsy Fund. 



My thanks are due to Dr. William Arnold for his invaluable help in shaping 

 theory and experiment. 



My thanks are due to Dr. Oscar Hechter for the patience with which he 

 listened to my gradually developing ideas and criticized this book. 



