BUREAU OF PLANT INDUSTRY. 



Chief of Bureau, Beverly T. Galloway. 

 Assistant Chief of Bureau, G. Harold Powell. 

 Editor, J. E. Rockwell. 

 Chief Clerk, James E. Jones. 



Physical Investigations. 



SCIENTIFIC STAFF. 



Lyman J. Briggs, Physicist in Charge. 

 J. O. Belz, Assistant. 



J. W. McLane and Julia R. Pearce, Laboratory Assistants. 



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