^ 7 /' ^ 



CIBA FOUNDATION 

 COLLOQUIA ON AGEING 



VOLUME I 

 General Aspects 



Editors for the Ciba Foundution 



G. E. W. WOLSTENHOLME, o.B.K, M.A., M.B., B.Ch. 



and 

 MARGARET P. CAMERON, M.A., A.B.L.S. 



Assisted by 

 JOAN ETHERINGTON 



With 38 lHustrations 



LITTLE, BROWN AND COMPANY 



1955 



BOSTON 



