est 



CIBA FOUNDATION SYMPOSIUM 



ON 



IONIZING RADIATIONS 



AND 



CELL METABOLISM 



Editors for the Ciba Foundation 



G. E. W. WOLSTENHOLME, O.B.E., M.A., M.B., B.Gh. 



and 

 CECILIA M. O'CONNOR, B.Sc. 



With 48 Illustrations 



LITTLE, BROWN AND COMPANY 



BOSTON 



