LETTER OF SUBMITTAL 



IT. S. DEPARTMENT OF AGRICULTURE, 



DIVISION OF CHEMISTRY, 

 Washington, J). C., February 39, 1892. 



SIR : I herewith submit to you the report which has been prepared 

 by Mr. E. E. Ewell and myself upon investigations of tea, coffee, and 

 cocoa preparations. That part of the report and bibliographic, work 

 upon cocoa preparations is entirely due to Mr. Ewell, who has also 

 assisted in the general analytical work. I also acknowledge the assist- 

 ance of Messrs. McElroy, Trescot, Krug, and Sanborn. 



This report has been unavoidably and materially delayed in its prepa- 

 ration, but this time has not been lost, since much of the foreign and 

 other work on artificial coffees has been accomplished since it was 

 begun. 



Respectfully, 



. Gr. L. SPENCER, 



Assistant Chemist. 

 Dr. H. W. WILEY, 



Chief Chemist. 



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