ON THE CULTURE 



large to ferment, as soon as' they fall from the 

 trees : they should be covered for some time at 

 first to prevent the upper leaves from being blown 

 away. The heap should afterwards be frequently 

 turned, and kept clean from weeds t the leaves 

 will be two years before they are sufficiently re- 

 duced to be fit for use. 



I shall just observe, that it will be proper to 

 keep the different heaps of compost at all times 

 clean from weeds, to turn them frequently, and 

 to round them up in long rainy seasons. If covered, 

 the better : but they should be spread abroad in 

 continued frosts and in fine weather. 



On a due Proportion of Air proper for the Hot- 

 House. 



It is from a due proportion of air admitted into 

 the hot-house, that the goodness of the Pine-plants 

 in a great measure depends. The want of it will 

 cause them to grow with long leaves and weak 

 stems, which plants never produce good fruit. 



On the other hand, air' admitted in too great 

 a quantity, or at improper seasons, will starve 

 the plants, and cause them to grow yellow and 

 sickly. 



In the winter months, during the time that the 

 plants are nearly in a state of inaction, the hot- 

 house will require very little air ; yet it will be 

 absolutely necessary to take every favourable op- 

 portunity to let out the foul air, and dry the house : 



