24 GENERAL THERAPEUTICS FOR VETERINARIANS 



icum), an amino derivate of phenyl arsin, an organically com- 

 bined arsenious acid, and arsacetin, an acetyl compound of atoxyl. 

 The knowledge that only the trivalent arsenic group exerts a 

 poisonous effect upon the cells of the body led by degrees to S3m- 

 thesis of arsenophenylglycin and salvarsan, organic arsenical prep- 

 arations with a predominant, parasitotropic, specific action against 

 syphilis and spirillosis. A remedy with a similar action against 

 trypanosomes is trypanred. The complete and immediate sterili- 

 zation of the organism with parasitotropic chemical substances is 

 termed by Ehrlich therapia sterilisans magna. 



