Issued July 15, 1911. 



U. S. DEPARTMENT OF AGRICULTURE, 



BUREAU OF CHEMISTRY— BULLETIN No. 138. 



H. W. WILEY, Chief of Bureau. 



TRANSLOCATION OF PLANT FOOD AND ELABORA- 

 TION OF ORGANIC PLANT MATERIAL 

 IN WHEAT SEEDLINGS. 



BY 



J. A. LE CLERC and J. F. BREAZEALE, 



Laboratory of Plant Physiological Chemistry. 



WASHINGTON: 



GOVERNMENT PRINTING OFFIOB, 



1911. 



