INTRODUCTION 21 



This introductory discussion should not be concluded without 

 a word on the subject of the term "Bacteriophage," a term which 

 has been criticized. The suffix "phage" is not used in its strict 

 sense of "to eat," but in that of "developing at the expense of;" 

 a sense that is frequently used elsewhere in scientific termi- 

 nology. Certain protozoa, for example, are parasitized by the 

 Nucleophaga which develop within the interior of the nucleus. 

 This is precisely the interpretation to be given the term "phage" 

 in the word "Bacteriophage." 



