166 REGULATION OF HEAT, &C. 



may be then kept as a standard heat, during the 

 time of ripening. 



In January, if not done before, the vinery 

 should be put in motion for early grapes in June, 

 with a gentle heat at first, from about 45 to 50 

 degrees, (which is better than being too warm 

 at first,) increasing it in about a week 5 degrees, 

 and in about another week to 55 or 60, and be- 

 fore the end of the month to 65, and the tempe- 

 rature may then be kept up as high as is requisite 

 for the pine stove. Also, other fruit houses should 

 be now made active, beginning with a low tem- 

 gerature, about 40, and not more than 47 or 

 50 during the month of January, nor yet much 

 higher until the fruit is set, 60 being the stan- 

 dard heat allowed, and ought not at any time to 

 exceed 65 ; this may be taken as a guide to 

 most other fruit tree forcing. 



Although rather foreign to this work, I may 

 be permitted to remark, that the greenhouse 

 will at this season require the greatest atten- 

 tion, and the nicest management, particularly 

 as regards the heating thereof, much mischief 

 being frequently done to the plants by making 



