Cornell TJniveksity, Ithaca, N. Y., February 20, 1896. 

 Honorable Commissioner of Agriculture, Albany: 



Sir, — For a number of years the farmers of western New York 

 have been asking for light upon the insidious and serious diseases 

 of the potato crop. A special effort has been made during the past 

 season to study these troubles, and although the season was unusually 

 dry and therefore not very productive of some diseases, the results 

 of the investigations seem to be so useful that they are submitted 

 for publication and distribution under Chapter 230 of the Laws 



of 1895. 



L. H. BAILEY. 



SYNOPSIS. 



Part I. Fungi. Pages 297 to 321. 



A. Descriptions of the fungous diseases, 297 to 312. 



1. Potato rot, late blight, or downy mildew, 297. 



2. Early blight, or leaf-blight, 302. 



3. Potato scab, 309. 



B. Treatments of the fungous diseases, 312 to 321. 



1. Potato rot or late blight, 312. 



2. Early blight, 312. 



3. Potato scab, 318. 

 Part II. Insects, 322 to 324. 



1. Potato beetle, 322. 



2. Flea-beetles, 323. 



Part III. Machinery for spraying potatoes, 325 to 328. 

 Summary, 329. 



