LEn'ER OF TRANSMITTAL. 



United States Department of Agriculture, 



Bureau of Biological Survey, 

 Washim/ton^ D. June 25, 1909. 

 Sir : I have the honor to transmit herewith and to recommend for 

 publication as a Farmers' Bulletin a report by David E. Lantz, an 

 assistant in the Biological Survey, on How to Destroy Rats. It 

 is in the main a digest of Bulletin 33 of this bureau, now out of 

 l^rint, and is intended to meet the numerous requests from all parts 

 of the country for practical directions for ridding communities of 

 these destructive rodents. If the importance of rat-proof construc- 

 tion in building and the necessity of depriving rats of food were 

 generally understood, the measures adopted for their destruction 

 would be far more successful. 

 Respectfully, 



C. Hart Merriam, 

 Chief, Biological Survey. 



Hon. James Wilson, 



Secretary of Agricultiii^e. 



