A SYMPOSIUM ON 



LIGHT 



AND 



LIFE 



Sponsored by 



THE McCOLLUM-PRATT INSTITUTE 



OF 

 THE JOHNS HOPKINS UNIVERSITY 



with support from 



The National Science Foundation 



Edited by 



WILLIAM D. Mcelroy and bentley glass 



BALTIMORE /^i^ - 



THE JOHNS HOPKINS PRESS /^^P^^* ^' 



IQfil /. . / '*'^3?SVy 



^ MAS8. 



