544 Report or tHE HorticuLrurRist OF THE 
ment are greater than in the cases which have just been considered, 
for not only were the tests made in different locations but in dif- 
ferent seasons. Catawba, Concord, Creveling, Diamond, Duchess, 
Eldorado, Empire State, Hartford, Lady Washington, Merrimack, 
Pocklington, Salem and Worden gave quite similar results for 
each variety in the different tests, thus furnishing additional evi- 
dence that there are varieties which show little if any varia- 
bility in the degree of self-fertility under decidedly different 
environment. 
Clinton, Delaware, Diana, Isabella, Moore arly, Niagara, 
Prentiss and Vergennes gave more or less variable results with the 
same variety in the different tests and different seasons. 
Taking into consideration all varieties which have been tested at 
the Station more than one season, it is seen that in a majority of 
eases the same variety shows a like degree of self-fertility in 
different seasons. In several instances the degree of self-fertility 
varies somewhat with the same variety in different seasons, but 
very rarely is the variation decidedly marked. 
But little has been done in comparing the degree of self-fer- 
tility of vines of the same variety located in different parts of 
the same vineyard. Such comparisons are not necessary to show 
that the degree of self-sterility may in some varieties be modified 
by differences in location. It has just been shown that with cer- 
tain grapes the degree of self-fertility varies under differences of 
environment. In some instances it is known to vary with the 
same variety in different vineyards, with the same vine in different 
seasons, with different clusters on the same vine and even with 
different blossoms in the same cluster. With such variable varie- 
ties it will without doubt vary the same season in different parts 
of the same vineyard, for so far as soil conditions are concerned 
different parts of the same vineyard may vary sufficiently to cause 
marked differences in the growth and physiological conditions of 
the vines. 
