CH. 5.] GRAPES. 107 



Out of the fun in dull weather, when there 

 is a good deal of fire heat in the houfe, is 

 attended with much danger. 



On the fuppofition that the plants have 

 made good xvood for the production of a 

 crop the third year, and are to be forced 

 from the firft . cf March ; let the houfe be 

 mut up at night from the middle of Fe- 

 bruary, and have the fame quantity of air 

 admitted in the day it enjoyed all Winter. 

 From the time the fire is lighted, give a ' 

 moderate quantity, every day, if poflible, 

 till the buds have all broke, to the extent 

 that in fun-mine the thermometer may not 

 rife more than 10 above the fire-heat me- 

 dium : but, after the buds have broke, and 

 the temperature of the houfe is increafed, 

 be careful in the admiffion of frofty, or 

 foul damp air. The latter may be entire- 

 ly excluded, except, perhaps, for an hour 

 or two in the middle of the day ; and the 

 bad effects of . the former may in fome 

 meafure be avoided, by opening the top 

 fafhes * only, a little way, to pafs off the 



rarified 



* Few people pay the attention, to this article which, 

 in my opinion, it deferves. I have often feen air ad- 

 mitted in a manner as if by mere chance 5 fometimes 



by 



