632 BACTERIAL DISEASES OF PLANTS 



1919. TAYLOR, WILLIAM RANDOLPH. On the production of 

 new cell formations in plants. Contributions from the Botani- 

 cal Laboratory of the Univ. of Pennsylvania, Vol. IV, No. 2, 

 pp. 271-299, 8 pis. 



1920. RUMBOLD, CAROLINE. The injection of chemicals 

 into chestnut trees. American Journal of Botany, Vol. VII, 

 No. 1, Jan., pp. 1-20, 7 text figures. 



1920. RUMBOLD, CAROLINE. Causes for the production of 

 pathological xylem in the injected trunks of chestnut trees. 

 Phytopathology, Vol. X, No. 1, Jan., pp. 23-33, 2 pis. 



1920. Harvey, R. B. Relation of Catalase, Oxidase, and 

 H + Concentration to the Formation of Overgrowths. Am. 

 Journal of Botany, May, 1920, pp. 211-221. 



