504 WILBURT C. DAVISON 



expense of the non-lysogenic. This enzyme not only dissolves 

 organisms but also favors the multiplication of bacteria which 

 produce this enzyme. In this way the bacteriolytic principle is 

 carried from generation to generation. It is highly improbable 

 that this phenomenon represents a defense mechanism on the part 

 of an animal against bacterial invasion. 



REFERENCE 



Davison, W. C. 1922 Filterable "substance" antagonistic to dysentery and 

 other organisms (d'Herelle's phenomenon, bacteriophage, bacterio- 

 lytic agent, etc.). A bibliographic review. Abstracts of Bact. (in 

 press). 



