GOO 



THE PRACTICAL GARDENER. 



[Jan. 



which are of wood, and differing notning from those in com- 

 mon use for growing these fruits ; in the second part is the 



basement {c c c c d), on which the 

 frame is placed, which are flues of 

 brick-work, having the side or outer 

 walls built open, as shown in the 

 section, &c. ; round these perforated 

 walls, linings of hot dung, or dung 

 and leaves are placed, the heat of 

 which enters the flues, and heats 

 the mould {c c c) in which the plants 

 grow. The chief advantages of this 

 pit are, that the dung requires no 

 preparation before using, and con- 

 sequently none of the heat is lost, 

 whereas in most other pits, the dung 

 requires to be considerably fermented 

 before it can be with safety used, 

 for fear of injuring the plants by 

 overheats, or the admission of rank 

 steam, neither of which can be the 

 case where this pit is used. It may, 

 however, be objected to, on account 

 of the first expense in the erection, 

 and the greater quantity of dung re- 

 quired to produce a sufficient heat, 

 owing to its having to find its way 

 through the sides and covers of the 

 flues before it can reach the mould 

 in which the plants grow. But where 

 neatness and order are looked to, 



