LETTER OF TRANSMITTAL. 
U. 8. DEPARTMENT OF AGRICULTURE, 
DIVISION OF CHEMISTRY, 
Washington, D. C., March 1, 1892. 
Str: I beg to transmit herewith for your inspection and approval the 
manuscript of Part Seventh of Bulletin No 15, relating to the adultera- 
tion of cotfee, tea, and chocolate. 
Respectfully, 
HWW They 
Chemist. 
Hon. J. M. RusK, 
Secretary of Agriculture. 
