,ETTER OF TRANSMITTAL 



U. 8. Department oe Agriculture, 



Bureau oe Plant Industry, 



Office of the Chief, 

 Washington, D. C, April 20, 190 % 

 Sir: I have the honor to transmit herewith the manuscript of a 

 technical paper entitled "Investigations of Rusts," by Mark Alfred 

 Carleton, Cereal ist in Charge of Cereal Investigations, Vegetable 

 Pathological and Physiological Investigations, and recommend its 

 publication as Bulletin No. 63 of the series of this Bureau. 



The two illustrations accompanying the manuscript are necessary- 

 to a complete understanding of the subject-matter of this paper. 

 Respectfully, 



B. T. Galloway, 



Chief of Bureau. 

 Hon. James Wilson, 



Secretary of Agriculture. 



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