New Yorx AGRICULTURAL EXPERIMENT STATION. 525 
occur. Plate LIII shows clusters of fruit thus produced by self- 
sterile varieties. Compare also Figure 1 of Plate LI with Figure 2 
of the same plate. Figure 1 shows the best clusters and, excepting 
one berry, all of the fruit which Brighton has produced on covered 
clusters in these experiments. Figure 2 shows a cluster of the 
same variety which was exposed to cross-pollination. 
Whenever self-sterile or nearly self-sterile varieties have pro- 
duced a good yield from uncovered clusters it shows that the vine 
was in good condition for testing. On the other hand a scant yield, 
or even a total failure to produce fruit from uncovered clusters 
cannot be accepted as proof that the vine was in an abnormally 
unproductive condition and not suitable for testing because the 
prevalence during the blooming season of a damp, cold atmosphere 
or of other conditions unfavorable to cross-pollination would mani- 
festly interfere with the setting of the fruit and reduce the yield. 
Moreover, either the tendency to great productiveness or the op- 
posite tendency appears as a varietal characteristic among self- 
sterile as among self-fertile sorts. For example, Elvibach and Red 
Eagle are both self-sterile. In 1894 and again in 1895 Elvibach 
gave a very light crop, although located in a mixed vineyard where 
the clusters were exposed to cross-pollination. Red Eagle, in the 
same vineyard, and under similar treatment, gave a fair yield in 
1894 and a very good yield in 1895. The Elvibach vines being 
mature and apparently in good health their failure to produce 
even a fair crop under the circumstances, together with the oen- 
eral record of the variety here, indicate that even were it not self- 
sterile it would be habitually a poor cropper. 
The following table gives a list of varieties tested as to self- 
fertility and shows for each variety the kind of stamens, the num- 
ber of clusters tested, the character of the covered fruit clusters 
and the character of the uncovered clusters of self-sterile varieties. 
