LETTER OE TRANSMITTAL. 



U. S. Departmext of Agriculture, 



Bureau of Puaxt Txdistrv, 



Office of the Chief, 

 Wa.'</ihi(/fo,i, D. r., ApriJ UK 1907. 

 Sir: I have the lioiior to transmit herewith and to recommend 

 for i:)iiblication as Bulletin No. 107 of the series of this Biireaii 

 the accompanying manuscript, entitled "American Boot Drugs." 

 This paper was prepared by Miss Alice Ilenkel, Assistant in Drug- 

 Plant Investigations, and has been submitted by the Physiologist 

 in charge with a view to its publication. 



The fifty drugs described include all the "official" roots found 

 in this country, besides such " nonofficial " drugs as are most fre- 

 quently <iuoted in drug catalogues. 



There is a steady demand for information concerning the medici- 

 nal plants of this country, and this bulletin on American root drugs 

 has been prepared as a first installment on the subject. It is intended 

 as a guide and reference book for farmers, drug collectors, drug- 

 gists, students, and others who may be interested in one way or 

 another in the collection or study of our medicinal flora. 



Respectfully, B. T. Galloway, 



Chief of Bureau. 

 Hon. James Wilson. 



Secretary of Agriculture. 



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