LETTER OF TRANSMITFAL 



U. S. Department of Agriculture, 



Bureau of Plant Industry, 



Office of the Chief, 



Washington, D. C, July 5, 1910. 

 Sir: I have the honor to transmit herewith a paper entitled ''The 

 Vahie of First-Generation Hybrids in Corn," by Mr. G. N. Colhns, 

 a Botanist of this Bureau, and recommend its piibhcation as Bulletin 

 No. 191 of the Bureau series. 



This report shows how the vigor and fertility of hybrids may be 

 utilized to increase the yield of the corn crop, in addition to other 

 factors of adaptation and breeding. 

 Respectfully, 



Wm. a. Taylor, 



Acting Chief of Bureau. 

 Hon. James Wilson, 



Secretary of Agriculture. 



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