LETTER OF TRANSMITTAL.
Reading edition
U. S. Department of Agriculture,
Bureau of Plant Industry,
Office of the Chief,
Washington, D. C., April 16, 1907.
Sir: I have the honor to transmit herewith and to recommend for publication as Bulletin No. 107 of the series of this Bureau the accompanying manuscript, entitled “American Root Drugs.” This paper was prepared by Miss Alice Henkel, 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 frequently quoted in drug catalogues.
There is a steady demand for information concerning the medicinal 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, druggists, 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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