LETTER OF TRANSMITTAL. 



U. S. DEPARTMENT OF AGRICULTURE, 



BUREAU OF CHEMISTRY, 

 Washington, D. C. , August 4-> 1904. 



SIR : I have the honor to transmit for your approval the results of 

 an investigation, made in the Insecticide and Agricultural Water 

 Laboratory of this Bureau, of the arsenic content of papers, especially 

 wall papers, and fabrics used for clothing and draperies. The mate- 

 rials which are the subject of these investigations are made from 

 important agricultural products, and the results of these studies have 

 intimate relations to the public health. A compilation of those laws 

 of the United States and of foreign countries which bear upon this 

 question is included. I recommend that this report be published as 

 Bulletin No. 86 of the Bureau of Chemistry. 

 Respectfully, 



H. W. WILEY, Chief. 

 Hon. JAMES WILSON, 



Secretary of Agriculture. 



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