letti:r of traxsmittal. 



U. S. Department of Agriculture, 



Bureau of Plant Industry, 



Office of the Chief, 

 Wasliington, D. C, January 17, 1911. 



Sir: I have the honor to transmit herewith a paper entitled "Bac- 

 teriological Studies of the Soils of the Truckee-Carson Irrigation 

 Project" and to recommend that it be published as Bulletin No. 211 

 of the series of this Bureau. 



These investigations, though in many ways of a preliminary char- 

 acter, indicate some of the possibilities of a bacteriological diagnosis 

 of soils and will be of interest to all who have to deal with problems 

 of soil fertility. 



Respectfully, Wm. A. Taylor, 



Acting Cliief of Bureau. 

 Hon. James Wilson, 



Secretary of Agriculture. 

 211 . 3 



