478 
STATE HORTICULTURAL SOCIETY. 
bow; rub off all the buds on the lower portion of the vines, 
and allow no fruit to set, as all the strength of the vine will be 
required to produce wood for next year’s fruiting. Keep the 
laterals pinched in, and l)y the end of the season, the canes 
wdll have reached the center of the bow. At the fall pruning, 
cut back to two feet, and cover with soil, and mulch for winter 
protection. The next season extend the fruiting canes to the 
center of the bows, and a moderate crop of fruit may be taken 
from last years wood. The next year the vine will be in full 
bearing. Prune ou the short spur system, renewing the canes 
as often as desirable. The advantages claimed for this trellis 
are cheapness, durability, and simplicity of construction; ex¬ 
posing the foliage to the rays of the sun, and at the same time 
shading the fruit; allowing a free circulation of air, and thus 
secure the necessary conditions in successful grape culture. 
I now come to the important matter of selecting varieties 
for the vineyard. This will depend more upon the location 
than the soil, as the aggregate amount of heat differs materially 
in the same latitude, and their adaptability can only be ap¬ 
proximated, by a close observation of the amount of heat re¬ 
quired by the different varieties, to bring them to perfection. 
Prom observations taken at Waterloo, K. Y., in 1862, and re¬ 
ported in the Ilorticultuvist^ I find that it requires an average 
of 53 ^ of Fahrenheit to bring the Delaware to leafing, which 
occurs about the middle of May, and an average temperature 
of 59^ fora period of forty-five days, or a total of 2,678^ 
Fahrenheit from the breaking of the leaves to the setting of the 
fruit; and requires a period of 122 days, with an average of 
68 ® , or an aggregate temperature^ of 7,927 ^ from leafing to the 
ripening of its fruit, while the Concord requires about 500 ^ 
more than the Delaware to bring it to perfection; and the 
Isabella needs 10,000 ^ , while the Catawba cannot do with less 
than 11,000 ^, and requires about 142 days from leafing to 
ripening. At Janesville, Wisconsin, for six years, from 1857 to 
1863, the summer mean teihperature averaged 71 Fahrenheit, 
and at Prairie du Chien, for 19 years, the summer mean cor¬ 
responds to 72 Fahrenheit, while at Green Bay, for four 
