Bulletin No. 24. V. P. P.-77. 



U. S. DEPARTMENT OF AGRICULTURE, 



DIVISION OF VEGETABLE PHYSIOLOGY AND PATHOLOGY. 

 B. T. OALLOWAV, Chief. 



THE BASIS FOR THE IMPROVEMENT 

 OF AMERICAiN WHEATS. 



BY 



MARK ALFRED CARLETON, 

 Cerealist, Division of Vegetable Physiology and Pathology. 



Issued December io, 1900. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 

 I 900. 



