U. S. DEPARTMENT OV AGR\CV\:\VRK. 



BUREAU OF PLANT INDUSTRY BULLETIN No. 63. 



B. T. GALLOWAY, Chiif of Hurcau. 



INVI^XnCATIONS OF ursTs, 



HY 



MARK ALFKKD CARLETON, 

 Cekkalist in Ciiak(sk of Cereal Investigations, 



VEGETABLE PATHOLOGICAL AND PHYSIOLOGICAL 

 INVESTIGATIONS. 



Issued July 12, 1904. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 



190i. 



