LETTER OF TRANSMITTAL 



UNITED STATES DEPARTMENT OF AGRICULTURE, 



BUREAU OF CHEMISTRY, 

 Washington, D. C., April 17, 1911. 



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

 panying 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. 

 Respectfully, 



H. W. WILEY, 



Chief of Bureau . 

 Hon. JAMES WILSON, 



Secretary of Agriculture. 



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