LETTER OF TRANSMITTAL 



United States Department of Agriculture, 



Bureau of Chemistry, 

 WasUngton, D. C, April 17, 1911. 

 Sir: I have the honor to submit for your approval the accom- 

 pJinjdng report of an investigation made by J. A. Le Clerc and J. F. 

 Breazeale, plant physiological chemists of this bureau, on the trans- 

 location of plant foods and the elaboration of organic plant material 

 in wheat seedlings. I recommend that this report be published as 

 Bulletin No. 138 of the Bureau of Chemistry. j 



Respectfully, j 



H. W. Wiley, \ 



Chief of Bureau. \ 



Hon. James Wilson, \ 



Secretary of Agriculture. i 



3 \ 



