LETTER OF TRANSMITTAL. 
U.S. DEPARTMENT OF AGRICULTURE, 
Bureau or Piant INpustRy, 
OFFICE OF THE CHIEF, 
Washington, D. C., December 14, 1912. 
Smr: I have the honor to transmit herewith a paper entitled 
“The ‘Rough-Bark’ Disease of the Yellow Newtown Apple,” by 
Mr. John W. Roberts, Assistant Pathologist of this Bureau, and 
recommend its publication as Bulletin No. 280 of the Bureau of Plant 
Industry. This paper has been submitted by Mr. M. B. Waite, 
Pathologist in Charge of the Office of Fruit-Disease Investigations, 
-with a view to its publication. 
This manuscript contains an account of an apple disease the cause 
of which has hitherto been unknown, together with a description of 
the fungus causing it and methods for its prevention. 
Respectfully, 
B. T. GALLoway, 
Chief of Bureau. 
Hon. JAMES Witson, 
Secretary of Agriculture. 
73508°—Bul. 280—13 3 
