U. S. DEPARTMENT OF AGRICULTURE. 

 BUREAU OF PLANT INDUSTRY -BULLETIN NO. 44. 



B. T. GALLOWAY, Chki of Bureau . 



THE BITTER ROT OF APPLES. 



HERMANN VON SCHRENK, 



Special Agent in Charge of the Mississippi Valley 



Laboratory, 



PERLEY SPAULDING, Special Agent. 



VEGETABLE PATHOLOGICAL AND PHYSIOLOGICAL 

 INVESTIGATIONS. 



Issued July 18, 1903. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE, 



1903. 



