122 



BOTANICAL GAZETTE 



[FEBRUARY 



In most cases the values of k given in these tables are fairly 

 constant and may be considered a strong indication that the 

 oxidase reaction is unimolecular. In table XI, column 3, table XII, 



TABLE IX 

 Healthy bark and pyrogallol 



* Brackets in this and following tables indicate those values of k 

 which were considered in calculating the mean. 



TABLE X 

 Diseased bark and pyrogallol 



column I, and table XIV, column i, the values for k show a gradual 

 increase throughout the experiment, and can scarcely be taken 

 to indicate a unimolecular reaction. Table XII, column i, how- 

 ever, is checked by tables IX and XII, column 3, the mean value 



