BUREAU OF PLANT INDUSTRY. 



Chief of Bureau, William A. Taylor. 

 Assistant Chief of Bureau, L. C. Corbett. 

 Editor, J. E. Rockwell. 

 Chief Clerk, James E. Jones. 



[Cir. 123] 



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ADDITIONAL COPIES of this publication 

 -ii- may be procured from the Superintend- 

 ent OF Documents, Government Printing 

 Office, Washington, D. C. , at 5 cents per copy 



