New York Agricultural Experiment Station. 547 



In the following classification the varieties are arranged in four 

 classes according to the average character of the clusters which 

 have developed from covered blossoms on vines in apparently nor- 

 mal condition. In cases where there is doubt as to whether the 

 vine was in proper condition for the test the name is followed by 

 a question mark to indicate that the classification is doubtful. 



Class 1 includes varieties which when self -fertilized have formed 

 none but perfect clusters and those with which the clusters have 

 varied from perfect to somewhat loose. 



Class 2 includes varieties which when self-fertilized have on the 

 average formed marketable, although not compact clusters. 



Class 3 includes varieties which when self-fertilized have on the 

 average produced clusters too loose to be marketable. This class 

 has a wide range. It extends from the varieties in Class 2 with 

 clusters not too loose to be marketable, to Class 4 which includes 

 the self-sterile sorts. There are varieties in this class which have 

 on the ' average produced self-fertilized clusters nearly compact 

 enough to be marketable, some being rather compact, but others 

 being loose. At the lower limits of the class are found varieties 

 which usually fail to produce fruit on covered clusters but 

 which occasionally have borne a few scattering fruits when the 

 clusters were covered. 



Class 4 includes those varieties which have not produced any 

 fruit on covered clusters. 



classification according to self-fertility. 

 Class 1. Clusters Perfect or Varying from Perfect to Somewhat Loose. 



