204 CULTIVATION. 



weeks. The tenderest, most valuable, or sickly 

 amono^ them, however, must not be so exposed, 

 but re-plunged in some other bed suitable for them. 

 Those placed in the green-house should have 

 full air in the middle of the day, but shut up on 

 nights. In September the bark-pit in the stove 

 must be again got ready for the plants, by add- 

 ing fresh bark, white-washing and cleaning the 

 walls and flues of the house, &c., and soon as 

 this is all done, the plants may be brought back 

 to their place, but not immediately plunged till 

 the state of the bed is fit for them. About the 

 middle of October fire heat is again applied; 

 the state of the weather regulates this, as well as 

 giving air, watering, &c., and, as the winter sets 

 in, neither much air nor water will be required ; 

 at least, considerable caution must be bestowed 

 in applying these elements. About Christmas 

 the bark-bed will require another addition of 

 fresh bark, turning, &c. In doing this, the ut- 

 most expedition must be used to get the plants 

 replaced, especially if the season be severe. 

 Should the fresh heat, thus obtained, fail before 



