New YorK AGRICULTURAL EXPERIMENT STATION. 389 
From the results shown with Hercules and with those Ver- 
gennes clusters on a bent cane which were left open to cross- 
pollination it appears that the treatment stimulated to greater 
productiveness. Some evidence of such stimulation is also 
found in the cases of Brighton and Eldorado. Sample clusters 
of the former are shown in Figs. 2 and 3, Plate XLII. For com- 
parison with them a cluster of Brighton hand-pollinated with a 
pollen of a self-fertile sort is shown in Plate XLIII. The treat- 
ment of the self-sterile Herbert and Salem failed to cause them 
to fruit. 
The self-sterile varieties Concord, Delaware, Empire State 
and Niagara have generally a higher average rating on girdled 
than on untreated canes, but the advantage of the treatment, 
if any, is not striking. 
If the girdling can be used on such nearly self-sterile varieties 
as Brighton and Eldorado, or such imperfectly self-fertile kinds 
as Vergennes, when these varieties stand in proximity to 
strongly self-fertile kinds and are exposed to cross-pollination 
from them throughout the blooming season, it may be that their 
productiveness may be thus profitably increased. Further in- 
vestigations should be made on this point, as well as a com- 
parative study of early and late girdling. 
