LETTER OF TRANSMITTAL. 
U. S. DEPARTMENT OF AGRICULTURE, 
BuREAU OF PLANT INDUSTRY, 
OFFICE OF THE CHIEF, 
Washington, 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. Taytor, 
Acting Chief of Bureau. 
Hon. James WiLson, 
Secretary of Agriculture. 
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