New York AGRICULTURAL EXPERIMENT STATION. 549 
alone. Plate L shows what was left of covered Eumelan clusters 
at the time the fruit ripened on the uncovered clusters. It is seen 
that not a fruit developed when the Eumelan was compelled to 
depend on itself for setting fruit. Herbert and Barry likewise 
fail to fruit when dependent on their own blossoms for pollina- 
tion. Brighton does but little better. The best results which its 
covered clusters gave in these investigations are the three clusters 
shown in Plate LI, Figure 1. But self-sterile varieties may produce 
well formed clusters when located near enough to other kinds of 
grapes so that cross-pollination can occur. The clusters of Her- 
bert and Barry shown in Plate LILI, and that of Brighton shown 
in Plate LI, Figure 2, were borne on vines which were located 
favorably for cross-pollination. 
The varieties which are named in Classes 1 and 2 produce well 
formed clusters of themselves. The covered clusters of Duchess 
and Diamond illustrated in Plate LIL show what. perfect clusters 
may develop on varieties in these classes when the blossoms are 
self-pollinated. The varicties named in Classes 1 and 2 may there- 
fore be planted alone without reference to cross-pollination. 
DATES OF BLOOMING. 
The following table is given in order to assist in determining 
what varieties may be used for cross-pollinating the varieties which 
are named in Classes 38 and 4. It shows the dates of blooming for 
vines in the Station vineyards only. Where but one date is given 
it shows when the first blossoms opened. The second of two dates 
shows the close of the blooming period.’ 
1The grape usually continues in bloom from six to ten days after the first 
blossom opens. The time from the opening of the first blossom till the vine 
comes into full bloom, that is to say, till a large proportion of the clusters are 
blooming, varies according to temperature conditions. If the weather be 
warm, it may not take more than from twenty-four to forty-eight hours. 
If the weather be cool, it will take a correspondingly longer time. The con- 
ditions of temperature, therefore, determine largely the length of the period 
of bloom. Millardet has shown that it is the temperature and not the degree 
of light which influences the rapidity of anthesis of the grapé. Anthesis 
