U. S. DEPARTMENT OF AGRICULTURE. 



BUREAU OF PLANT INDUSTRY— BULLETIN NO. 224. 



B. T. GALLOWAY, Chief of Bureau. 



TIMOTHY REST IX THE UNITED STATES. 



BY 



EDWARD C. JOHNSON, 



Pathologist in Charge of Cereal Disease Work, 

 Office of Grain Investigations. 



Issued August 4, 1911. 



WASHINGTON:. 



GOVERNMENT PRINTING OFFICE. 



1911. 



