BULLETIN No. 63. 



U. S. DEPARTMENT OF AGRICULTURE, 



BUREAU OF CHEMISTRY. 



EXHIBIT 



BUREAU OF CHEMISTRY 



PAN-AMERICAN EXPOSITION, 



BUFFALO, NEW YORK, 1901. 



PREPARED UNDER THE DIRECTION OF 



HARVEY W. WILEY, 

 CHIEF OF BUREAU, 



BY 



E. E. EWELL, W. D. BIGELOW, AND LOGAN WALLER PAGE. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE, 



1901. 



