5G 



nature of the case only one portion has been completed. What possi- 

 bilities lie in the way of experimenting purely with the germ in order 

 to attain the necessary virulence actual experiment will have to dem- 

 onstrate. In addition to giving- attention to the virulence of the dis- 

 ease germs, more study should be given the natural conditions in order 

 to determine whether they may be artificially varied so as to be more 

 conducive to the dissemination of disease. 



Above all, the subject ought not to be summarily dismissed, since 

 only a limited number ol germs could possibly be experimented with. 

 True, the most hopeful ones were experimented with first, but yet it may 

 transpire that other well-known diseases, not yet tried, may be efficient. 

 The work has really been one of elimination of some specific germs by 

 which it was thought certain desirable results could be attained rather 

 than such as to conclusively demonstrate the impracticability of util- 

 izing insect diseases in the province of economic entomology. 



