524 Report of the Horticulturist of the 



had developed into fruit. If no fruit, or none but abortive fruit 

 developed, that fact was noted. Plate L illustrates a case of a 

 variety which produced no fruit when self-pollinated. Plate LI, 

 Figure 1, shows the results with a nearly self -sterile variety, while 

 Plate LII shows how perfectly the covered clusters may develop 

 when the variety is self-fertile to a high degree. 



The degree of compactness of the uncovered clusters was also 

 recorded in many cases, but unfortunately not in all. In the case 

 of vines located at the Station the yield of the vine was recorded. 

 In a few instances, after the blossoms had been covered the vines 

 appeared to be in an unsatisfactory condition for the test as mani- 

 fested by abnormal unproductiveness, injury, weakness, disease, 

 ?oo rampant growth or some other disqualifying feature. The 

 records of such vines, if presented at all, are not included in mak- 

 ing the final estimate upon which the classification of the variety 

 as to its self-fertility is based. In some cases it has appeared 

 doubtful whether the vine was in a proper condition for the test. 

 When the final estimate is based on such tests it is marked as 

 questionable. 



RECORD OF RESULTS. 

 The results of the tests with each variety are set furth for each 

 year and each locality in Table I. The number of clusters in- 

 cluded in each test is stated and the kind of stamens is given ex- 

 cept for a very few varieties with which no observations on this 

 point have been made. For self-sterile varieties and for those in 

 which the self-sterilized clusters were on the average too loose to 

 be called marketable, the yield of the entire vine, or vines, as the 

 case may be, is stated to show the degree of productiveness from 

 uncovered clusters. In many cases where covered clusters have 

 failed to fruit, or have fruited imperfectly, the same vine has 

 given a fair, or even a good yield, from the uncovered clusters. 

 This is accounted for by the fact that, all of the vines included in 

 these experiments have been located where cross pollination could 



