142 DESCRIPTION OF HOTHOUSES. 



I need only remark further on this subject, 

 that where pits are intended for pines, they 

 may be made of such dimensions that will suit 

 them in their various stages of growth ; but I 

 am still of opinion that a moderate bottom heat 

 is highly essential for the growth of pines, 

 indeed the bark bed heat alone, in pits of this 

 description, is sufficient, except in very severe 

 weather for the young plants, or to strike the 

 suckers and crowns in, the proper seasons and 

 management of which will be hereafter de- 

 scribed. 



Hotbeds made of dung, are sometimes for 

 convenience substituted for bark beds, for 

 striking the suckers and crowns, with common 

 deep garden frames and lights, and may con- 

 tinue therein two or three months, or occa- 

 sionally through the winter, where there is not 

 a more proper place ready to receive them ; 

 the beds should be made in the usual form of 

 dung hot-beds, three or four feet deep with the 

 frames placed thereon, and in about eight or 

 ten days, or when the violent heat has abated, 

 place on the top of the dung within the frame 



