338 HOT-HOUSE OF SHUTTERS, &c. [DEC. 



tial. If they are frequently painted with care, they will 

 last many years. No snow ought to be allowed to lay 

 on these while they are on the glass, for reasons that 

 we have assigned. See January and February. 



Some adopt double panes of glass to supersede the 

 use of shutters, which they think are attended with con- 

 siderable labour, (at the most only ten minutes ? a day 

 while in use.) The sash frame is made a little deeper, 

 so as to allow half an inch between the panes of glass. 

 The one is glazed from the out and the other from the 

 inside. It appears to answer the purpose tolerably well, 

 but the glass must be both fine and even in the surface, 

 lest a lens should be produced, and cause a focus, which 

 would evidently hurt some part of the plants. We are 

 almost confident that we have seen this effect in some 

 instances. There must be a small hole about an eighth 

 of an inch in both ends of each row of glass to allow a 

 current to dry up the moisture that may arise. 



OF PLACING BULBS, &c. IN THE HOT-HOUSE. 



If any Hyacinths or other Dutch roots are wanted to 

 flower early, a few of them may be put in the Hot-house 

 near the front glass, which will greatly tend to forward 

 their time of flowering. By having some brought in 

 every two weeks, a continued succession of frloom will 

 be kept up. 



Calceolarias. Two or three plants of the fine bloom- 

 ing kinds may be placed in this department, towards 

 the end of the month. Divide the roots as soon as they 

 begin to grow, leaving only one stem to each root, 



