

LETTER OF TRAXSMITTAL 



I'. S. DEPARTMENT OF AGRICULTURE, 



BUREAU OF PLANT INDUSTRY, 



OFFICE OF THE CHIEF, 

 Washington, D. C., February 12, 1909. 



SIR : I have the honor to transmit herewith a paper entitled ' ' Dis- 

 eases of Deciduous Forest Trees/' by Hermann von Schrenk, formerly 

 Expert in Charge of the Mississippi Valley Laboratory of the Bureau 

 of Plant Industry, and Perley Spaulding, Pathologist, Investigations 

 in Forest Pathology. 



The paper embodies the results of several years of investigation 

 and gives a general account of the principal diseases of our hardwood 

 forest trees. I recommend that it be published as Bulletin No. 149 

 of the series of this Bureau. 



Respectfully, B. T. GALLOWAY. 



Chief of Bureau. 

 Hon. JAMES WILSON, 



Secretary of Agriculture. 



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