94 PROTEIN POISONS 



of the poisonous group of the protein molecule. Attention 

 is called also to the comparative simplicity of the group and 

 to the great similarity of acids obtained from the different 

 poisons. This accords well with the great similarity and 

 non-specificity of their physiological action. 



It is interesting that the final residue left after distilla- 

 tion of the esters gives still a very intense Millon reaction, 

 which cannot be ascribed to the presence of tyrosin. 



It will be clearly understood that this work does not 

 show that the active agent or agents in the " crude soluble 

 poison" is or are protein in nature. 



