LEHER OF TRANSMriTAL. 



U. S. Department of Agkiculture, 

 Division of Vegetable Physiology and Pathology, 



Wa.s/iin(/to?t, D. C, June 12, 1900. 

 Sir: I respectfully transmit herewith the nianust-ript of a paper on 

 xenia, or the immediate effect of pollen, in maize. l)y Mr. Her})ert J. 

 Webber, of this division. The paper is technical, l)ut the subject 

 discussed has a broad practical application in the work on plant })reed- 

 ing now under way. I respectfully recommend the puljlication of the 

 paper as Bulletin No. 22 of this division. 

 Respectfully, 



Hon. James Wilson, 



Secretary of Agriculture. 



B. T. Galloway, 



Chief of Division. 



