LETTER OF TRANSMITTAL 



U. S. DEPARTMENT OF AGRICULTURE, 



BUREAU OF CHEMISTRY, 



Wax/thtytmi, D. <?., X<>r<,l>er 6, 1903. 



SIR: I have the honor to transmit for your inspection and approval 

 a manuscript reporting the results of investigations relative to the 

 adulteration of certain drugs and chemicals. These investigations 

 were carried on chiefly in the drug laboratoiy of this Bureau, although 

 some of the work described was done by Mr. Kebler before taking 

 charge of that laboratory. I recommend that this manuscript be 

 published as Bulletin No. 80 of this Bureau. 

 Respectfully, 



H. W. WILEY, Chief. 

 Hon. JAMES WILSON, 



Secretary of Agriculture. 

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