U. S. DEPARTMENT OF AGRICULTURE. 



BUREAU OF PLANT INDUSTRY^BULLETIN NO. 224. 



B. T. GALLOWAY, Chief of Bureau. 



TIMOTHY RUST IN THE UNITED STATES. 



BY 



EDWARD C. JOHNSON, 



Pathologist in Charge of Cereal Disease Work, 

 Office of Grain Investigations. 



Issued Augdst 4, 1911. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 



1911. 



