LETTER OF TRANSMITTAL. 



U. S. DEPARTMENT or AGRICULTURE, 



BUREAU or CHEMISTRY, 

 Washington, D. C., March 27, 1911. 



SIR: I have the honor to submit for your approval a report on the 

 results of a three-year investigation of the composition of Americar 

 grapes, conducted at Charlottesville, Va., and Sandusky, Ohio, bj 

 William B. Alwood, the enological chemist of this bureau, covering 

 the principal commercial varieties of American grapes grown in the 

 central and eastern sections of the country, and also other varieties 

 not generally cultivated. These data, even though the study is fai 

 from complete, are of practical importance to the grape growers and 

 manufacturers of grape by-products, as well as of scientific interest 

 and I recommend their publication as Bulletin No. 145 of the Bureau 

 of Chemistry. 



Respectfully, H. W. WILEY, 



CJiief of Bureau. 

 Hon. JAMES WILSON, 



Secretary of Agriculture. 

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