278 



THE BACTERIOPHAGE AND ITS BEHAVIOR 



I have shown that^^^ it is only necessary to carry out the distillation in 

 such a way that these bubbles (droplets of Fliigge) can not form to secure 

 a distillate free of all bacteriophage, even if in the process the filtrate is 

 evaporated to dryness. Such a result is, indeed, inevitable, for, in view 



B 



Fig. 6. Apparatus for Distilling at Low Temperatures 

 A, receptacle within which the fluid to be distilled is placed; B, cooling tube; 

 C, receptacle for collecting the distillate; D, rubber stopper closing A and sup- 

 porting B; E, rubber stopper closing cooling tube B; F, out-flow tube for the 

 cooling fluid; G, in-flow tube for the cooling fluid. 



of the fact that the bacteriophage is corpuscular in nature, volatilization 

 is physically impossible. 

 Because of the disputed nature of this fact, it may be well to insert an 



