LETTER OF TRANSMITTAL 



UNITED STATES DEPARTMENT OF AGRICULTURE, 



BUREAU OF CHEMISTRY, 

 Washington, D. C., June 3, 1908. 



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

 investigations, conducted in 1905 and 1907, concerning the quality of 

 Sicilian sumac imported into this country, chemical and micro- 

 scopical examination of a large number of samples having been 

 made. This study was made in the Leather and Paper Laboratory 

 of the Bureau of Chemistry because of its direct bearing on the 

 leather trade interests of the country, as well as because, of its rela- 

 tion to the increased production of sumac in the United States. 

 Material assistance in the performance of the laboratory work 

 involved in this investigation was rendered by H. H. Hurt and C. C. 

 Smoot, of the Leather and Paper Laboratory. I recommend the- 

 publication of this report as Bulletin 117 of the Bureau of Chemistry 

 Respectfully, 



H. W. WILEY, 



Chief of Bureau. 

 Hon. JAMES WILSON, 



Secretary of Agriculture. 



117 (2) 



