188 



Mycologia 



case of poisoning in Dr. Deming's family (p. 178) and suggested 

 the desirability of an inquiry into the cause. At Professor Gies r 

 request we conducted these experiments. The sincere thanks of 

 the writers are due to Professor Gies for his interest and sugges- 

 tions. Dr. Murrill very kindly supplied us with the fungi used 

 in this work, and to him also our thanks are due. 



Laboratory of Biological Chemistry of Columbia University, 

 College of Physicians and Surgeons, 

 New York City. 



