LETTER OF TRANSMITTAL 



U. S. DEPARTMENT OF AGRICULTURE, 



BUREAU OF CHEMISTRY, 

 Washington, D. C., March 19, 190 J^. 



SIR: I have the honor to transmit for your approval a report on a 

 series of spraying experiments with Paris Green, prepared in the 

 insecticide and agricultural water laboratory of this Bureau, and to 

 recommend its publication as Bulletin No. 82 of the Bureau of Chem- 

 istry. It is desired to acknowledge especially the cooperation of the 

 Division of Entomology and the contributions of the various experiment 

 stations named, at which so large a part of the work was performed. 

 The two half-tone plates express graphically one of the most important 

 points made in the bulletin and are deemed of value in impressing 

 the conclusions drawn in the text. 

 -Respectfully, 



H. W. WILEY, Chief. 



Hon. JAMES WILSON, 



Secretary of Agriculture. 



