LETTER OF TRANSMITTAL. 
Unitep States Treasury DEPARTMENT, 
Pusiic Hearty anp Marine-Hospirar Service, 
Washington, D. C., April 20, 1911. 
Str: With the approval of the Secretary of the Treasury, I have 
the honor to transmit herewith a manuscript entitled “ The Sanitary 
Privy,” prepared by C. W. Stiles and L. L. Lumsden, of the Hygienic 
Laboratory of this service. Professor Stiles is also consulting zoolo- 
gist in the Bureau of Animal Industry, Department of Agriculture. 
For some years past these two officers have been making a special 
study of certain diseases which are particularly incident to farm hfe 
and of the methods by which these infections are spread, and their 
reports thereon have appeared in the publications of the Public 
Health and Marine-Hospital Service. These have been revised, and 
the manuscript, with the description of additional research work, is 
submitted, that it may become available through the Department of 
Agriculture to those living on farms, who naturally look to your 
department for such information. 
Respectfully, Watrer WrMan, 
Surgeon General. 
Hon. James WIitson, 
Secretary of Agriculture. 
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