LETTER OF TRANSMITTAL. 



U. S. Depahtmext of Agriculture, 



Bureau of Plant Industrt, 



Office of the Chief, 

 Washington, D. C, August 3, 1910. 



Sir: I have the honor to transmit herewith and to recommend for 

 piibHcation as Bulletin No. 197 of the series of this Bureau the 

 accompanying manuscript entitled "The Soy Bean; History, Varie- 

 ties, and Field Studies." 



This paper was prepared by ^h\ C. V. Piper, Agrostologist, and 

 Mr. W. J. Morse, Scientific Assistant, of the Office of Forage-Crop 

 Investigations. 



The soy bean is a striking example of a crop with very numerous 

 varieties, the wealth of which has been largely disclosed by the 

 studies here presented. This crop is already of considerable value 

 in the United States, and there can be but little doubt that it is des- 

 tined to become of much greater importance, not only for forage, but 

 in all probability for the production of oil and oil cake. The results 

 here presented bring together much information that will be of 

 interest to students and experimenters, and which, it is believed, 

 will be of material assistance to all agronomic investigators. 



Respectfully, 



G. H. Powell, 



Acting CJiief of Bureau. 



Hon. James Wilson, 



Secretary of Agriculture. 



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