910 



In the second place it is of importance because we learn to under- 

 stand the very intense action of boric acid on the vegetable organism; 

 it stands to reason that small quantities of this substance must 

 exercise a considerable influence if it is able to turn the very common 

 tannins from almost neutral substances into strong acids. 



Org. Chem. Lab. of the Technical University. 

 Delft, November 1918. 



