Previous Symposia of the McCollum- Pratt Institute 



Copper Metabolism — A Symposium on Animal, Plant and Soil Relationships. 



Phosphorus Metabolism— A Symposium on the Role of Phosphorus in the Meta- 

 bolism of Plants and Animals. Vol. I. 



Phosphorus Metabolism— A Symposium on the Role of Phosphorus in the Meta- 

 bolism of Plants and Animals. I'ol. II. 



The Mechanism of Enzyme Action. 



Amino Acid Metabolism. 



Inorganic Nitrogen Metabolism. 



The Chemical Basis of Heredity. 



The Chemical Basis of Development. 



© 1961 by TIk' Joliiis Hopkins Press, Baltimore IS, Md. 



DistrilMited in (.real Britain l)v Oxford University Press, London 



Piimed in tlic United .States of Amcrita l)v the Horn-Shafer Company. Baltimore 



Library of Congress Catalog Card Number fi()-l().")44 



