CONSTRUCTION OF HOT-HOUSES, 



wall ; but it will be unnecessary to have a double 

 return to either of them ; as a house of the above- 

 mentioned width and height, to the extent of fifty 

 feet in length, may thus be fully commanded. 



A late grape-house may be of any convenient 

 length, from thirty to fifty feet; fourteen feet wide, 

 and fifteen or sixteen feet high ; with, or without 

 front glass, as above hinted. But if it have upright 

 glass, both glass and parapet should not exceed five 

 feet in height ; as it is but seldom that any fruit 

 grows below the angle of the rafter, and, if it do, 

 it is never so well ripened as the fruit growing un- 

 der the sloping sashes. The flues may be conduct- 

 ed, in every respect, as above directed for the early 

 house, and the number of furnaces must be regulat- 

 ed by its length. If under thirty-five feet, one 

 furnace may do ; but if longer, it will require two 

 furnaces, in order to have a perfect command of the 

 temperature necessary for grapes. 



The parapet and front flue of both these houses 

 should stand on pillars, three and a half feet deep 

 under the ground-level, in order that the roots of 

 the plants may have free scope to run to the border 

 without the house; as the intention is to plant them 

 inside, and train /them under the roof, to a trellis 

 fixed to the rafters. 



4. Of the Peach-House. 



A peach-house for the earliest forcing, to be com- 

 manded by one furnace, may be of any length, from 

 thirty to forty feet ; eight or nine feet wide, and 

 twelve feet high. It should have no upright glass. 



