48 



CHEMICAL AGENTS AND PROTOPLASM 



[CH. I 



relative resistance capacity. The reagents are placed with the 

 weakest-acting first. 



TABLE VII 



From this table we see that the bacillus of glanders is more 

 resistant than that of anthrax (except in one instance, in which 

 the resistance is equal in the two .cases) whatsoever be the 

 poison employed. The bacillus of glanders affords, thus, a 

 good illustration of an organism with a general high resistance 

 capacity. 



The diversity in general resistance capacity which is found 

 among bacteria exists also among other organisms. Thus, the 

 parasitic Ascaris has shown itself highly resistant in all cases 

 in which the action of a poison on it has been compared with 

 that on another species; for instance (p. 10) 0.1% chloral 

 hydrate kills Infusoria, Rotifera, and diatoms in 24 hours, but 

 Ascaris withstands this solution. Again, while 0.1% HCN 

 kills Infusoria quickly, Ascaris resists 3% for 75 minutes. The 

 general higher resistance may be due to one of three causes : 



