LETTER OF TRANSMITTAL. 



U. S. DEPARTMENT OF AGRICULTURE, 



BUREAU OF CHEMISTRY, 

 Washington, D. C., July 1, 1901. 



SIR: I have the honor to transmit to you herewith the manuscript 

 of a description of the exhibit of the Bureau of Chemistry at the 

 Pan-American Exposition, Buffalo, N. Y., 1901, with the request that 

 it be published as Bulletin No. 63 of the Bureau of Chemistry. 



H. W. WILEY, Chemist. 

 Hon. JAMES WILSON, 



Secretary of Agriculture. 



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