J. 3( 



VIRUSES 



by 

 MAX A. LAUFFER, Ph.D. 



Associate Research Professor of Physics 



The University of Pittsburgh 



Pittsburgh, Pentisylvania 



1946 



From 



The Twentieth Aooual 

 PRIESTLY LECTURES 



Sponsored by 

 Phi Lambda Upsilon 



Honorary Chemical Society 



THE PENNSYLVANIA STATE COLLEGE 

 State College, Pennsylvania 



