LETTER OF TRANSMITTAL 



U. S. DEPARTMENT OF AGRICULTURE, 

 BUREAU OF PLANT INDUSTRY, 



OFFICE OF THE CHIEF, 

 Washington, D. <?., April 30, 1904. 



SIR: I have the honor to transmit herewith a paper entitled "A 

 Method of Destroying or Preventing the Growth of Algae and Certain 

 Pathogenic Bacteria in Water Supplies," and to recommend that it be 

 published as Bulletin No. 64 of the series of this Bureau. 



The paper was prepared by George T. Moore, in charge of Labora- 

 tory of Plant Physiology, and Karl F. Kellerman, Assistant in Physi- 

 ology, in the Office of Vegetable Pathological and Physiological 

 Investigations, and was submitted by the Pathologist and Physiologist 

 with a view to publication. The subject discussed in this bulletin 

 will be of interest and value to all who have to deal with the problem 

 of preventing algal and other contamination of water supplies. 

 Respectfully, 



B. T. GALLOWAY, 



Chief of Bureau. 

 Hon. JAMES WILSON, 



Secretary of Agriculture. 



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