LETTER OE TRANSMITTAL 



United States Department of Agriculture, 



Bureau of Chemistry, 

 Washington, D. C, February 15, 1910. 

 Sir: I have the honor to submit for your approval the results of 

 a series of investigations made by the chief of the miscellaneous 

 division of this bureau in regard to the injury to vegetation and ani- 

 mal life observed in the vicinity of certain smelters, particularly one 

 located at Anaconda, Mont. The original report was issued in May, 

 1908, and has now been revised to include a second investigation 

 subsequently conducted at Anaconda. These studies have been made 

 in this bureau from time to time during the past eight years in coopera- 

 tion with the Bureau of Forestry in the preservation of the forests and 

 the protection of the farming interests. I recommend that this report 

 be published as Bulletin 113, Revised, of the Bureau of Chemistry. 

 Respectfully, 



H. W. Wiley, 

 CJiief of Bureau. 

 Hon. James Wilson, 



Secretary of Agriculture. 



