LETTER OF TRANSMITTAL 



IT. S. DEPARTMENT OF AGRICULTURE, 



DIVISION OF CHEMISTRY, 

 Washington, 7). <7., March 1, 1892. 



SIR: I beg to transmit herewith for your inspection and approval the 

 manuscript of Part Seventh of Bulletin No 13, relating* to the adultera- 

 tion of coffee, tea, and chocolate. 

 Respectfully, 



H. W. WILEY, 



Chemist. 

 Hon. J. M. RUSK, 



Secretary of Agriculture. 



