100 THE GRAPE. 
are in such a state. during the months uf July and Aug st 
when the gporules of the fungus are most active, it is very 
necessary to keep careful watch, and avoid as much as 
pessible all sudden transitions of temperature; do not 
allow the house to be closed until it beeomes hot, but 
admit air freely whenever required; be wary of bottom 
dialts, keep the lower ventilators closed in damp weather, 
and if such continues for any length of time with a humid 
atmosphere, a little artificial heat may be applied for the 
time being, with the upper ventilators opened; which will 
keep down the thermometer, dry the air, and stay the 
progress of the mildew if it be present, or prevent its 
germination if not so. Sulphur aught to be liberally 
strewed over the floor for the same purpose, and if a small 
quantity be thrown on the fiue, avoiding the hottest enil, or 
on any part of the hot water pipes; as the ease may be, 
there need not be any fear of its ravages extending. An- 
other mischief to be expected at times to this erop is, 
shrivel and shanking, the best means of avoiding which is 
to continue the same regularity of management that has 
been observed through the whole progress, and until the 
fruit is eolored; after this period there is no danger, and 
the house may afterwards be left open constantly, or par- 
tially, or entirely closed, as the weather may be wet or 
frosty. A portion of the grapes in this house will have to 
remain on the vines during the winter, and must be kept 
quite dry and free from frost, which makes it necessary to 
use a trifle of fire-heat at times, just enough, but not more 
than, to answer the purpose; and if the berries were not 
well thinned at the proper time, they ought to be furtha 
 redueed in number now, so that they may hang loosely, 
a oe close eontact, aud admitting a free 
