CULTURE OF THE VINE, &c. 
127 
As this kind of forcing in a manner fpoils the Vines, it is 
oeceffary to have the Vine-walls at lead; five times the length 
of the frame, in order to furniili a fuccefiion of well-perfected 
wood. , 
After the crop is over, the Vines, in the courfe of the enfu- 
ing winter, muft be cut down nearly to the bottom, and they 
require a term of four or five years to recover themfelves for 
another early crop. 
The frame defcribed would certainly admit of improvement,, 
and fiued walls would alfo be of further advantage, by co- 
operating with the flue on the infide of the frame. But flill, 
this mode of forcing is by no means to be recommended in this 
country. On the continent, the fky is, for the moft part, clear. 
There is almofl: daily funlhine, and the weather is regular and 
fettled during the winter feafon. There nothing is required 
but attention to guard againfl; the feverity of the frofls ; but in 
a climate fo fubjedt to variation as ours, the fame method of 
forcing can never be approved, becaufe no means have yet been 
difcovered, to counteradl the fad eflfedts of the frequent cloudy - 
dull days which we experience, and in which a ftrong fire- 
heat, fuch as w^ould necelTarily deflroy all our future hopes, 
mufl: be applied. In fhort, vegetation cannot be carried on to 
any good purpofe without the aid of the fun’s heat; and, 
theretore, though in forcing, it be ealy to guard againfl: the 
feverity of the nights, yet there is no fecurity againfl; long-con- 
tinued- 
