On the Culture of the Mango and Cherimoyer. 255 



unsuccessful experiments had been conducted. They were 

 very high, and the tops of the small trees consequently stood 

 at a considerable distance from the glass ; and these circum- 

 stances, I believe, are always considered by Gardeners to be 

 disadvantageous. In one respect only the management of 

 the Mango trees in the stoves of the Earl of Powis differed 

 essentially from mine : the pots, in which my plants grew, 

 were on every side fully exposed to the air, whilst his Lord- 

 ship's were plunged into a bark-bed, into which the ap- 

 pearance of the plants left no doubt upon my mind of their 

 having rooted deeply. The temperature of the bark-bed 

 appeared to me to be very low, and judging from that of its 

 surface, the moderate size of the bed, and the distant period 

 at which it had been made, I doubted whether it con- 

 tinued to generate any degree whatever of internal heat. 

 But whether the bed did, or did not, continue to generate 

 heat, I did not, nor do I now, consider the success of the 

 mode of culture to have resulted in any degree from the 

 temperature of the material in which the roots of the plants 

 grew ; for the temperature of the mould in which my plants 

 grew was, 1 conceive, as favourable as possible. That of the 

 air was varied in my stove generally from about 70° to 85° of 

 Fahrenheit's scale ; and I ascertained, by keeping a ther- 

 mometer immersed in the mould of the pots, that the tem- 

 perature of that varied very considerably less than that of the 

 air of the stove, the mould being in the morning generally 

 some degrees warmer than the air of the house, and in the 

 middle of the day and early part of the evening, some degrees 

 cooler. 



I have subsequently attempted to cultivate the Cherimoyer 



