LETTER OF TRANSMITTAL. 



SIR: I have the honor to transmit herewith a report on the investi- 

 gations and experiments made the past three years by Dr. Erwin F. 

 Smith, under the direction of this Division, with a view of obtaining 

 evidence as to the communicability of peach yellows. There is no 

 longer any doubt as to the contagious nature of this disease, and it 

 now remains as a part of this line of work to determine definitely its 

 period of incubation, methods of spreading other than by budding, and 

 the nature of the contagium. Investigations bearing on these points, 

 as well as exceedingly extended and laborious ones with fertilizers, are 

 now, and have been for some time, under way. 

 Respectfully, 



B. T. GALLOWAY, 



Chief of Division. 

 Hon. J. M. EUSK, 



Secretary of Agriculture. 



