22' 



BOTAXICAL GAZETTE 



MARCH 



TABLE II 



Effect of o.ioN alkali carbonates on oxidation of pyrogallol by powdered 

 healthy apple bark; temperature 2g.3-30.0°c. 



Fig. 2. — Effect of K 2 C0 3 on oxidation of pyrogallol, with and without bark 

 (healthy): A, K 2 C0 3 +bark and pyrogallol; B, K 2 COj+pyrogallol; C, control (bark 

 and pyrogallol). 



