38 The Principles of Parti. 



tables turn to rich foil when they have un- 

 dergone a degree of corruption j even oak 

 bark becomes in time rich black mould. 

 The parts wilt be the fooner feparated, if 

 fome earth or clay is added to the mofs ; 

 for mofs of itfelf is rather an enemy to cor- 

 ruption. All kinds of vegetable fubflances 

 and animal bodies are preferved uncorrupted 

 for whole ages in mofs-holes. Abforbents 

 are known from experience to be promoters 

 of corruption. The various kinds of marl, 

 when they can be got, particularly the 

 mell-marl, would feem to be the propereft 

 manures for this foil. Lime, as it appears 

 to be a great diflblvent of all vegetable bo- 

 dies, may have good effects on this foil. 



PART 



