348 



THE BACTERIOPHAGE AND ITS BEHAVIOR 



Experiments with mercuric chloride. Table 38 summarizes the results 

 of an experiment involving the adaptation of the same bacteriophage 

 (Shiga) to the action of corrosive sublimate. 



Experiments with chloramine. The experiment dealing with adapta- 

 tion to phenol has already shown that if the material is spread on agar 

 during the adaptation the corpuscles of the different plaques, that is, 



the different colonies of the bacteriophage, do not have an equal resist- 

 ance, since with the corpuscles originating in one of the colonies (Plaque 

 No. 1) of 100 corpuscles 82 resisted the action of the phenol, and with 

 those of the other (Plaque No. 2) only 15 resisted. 



This inequality in the adaptation of the different corpuscles of a sin- 

 gle suspension is well shown by the experiments on the action of chlor- 



