*fbe Principles of Part II. 



that foil has the loofeft texture, the lime 

 falls quickly through it, 



BESIDES; by mixing itfelf with the ole- 

 aginous particles of the foil, and convert- 

 ing them to the nourifhment of plants, 

 lime becomes in this fenfe a provocative to 

 the foil. In promoting the work of vege- 

 tation, it will foon exhauft all the oils of 

 the light foils, which contain them but in 

 fmall quantity, and when they are all ex- 

 traneous, for fand can afford none. But 

 a clay foil, containing in itfelf a confide- 

 rable quantity of oil, and that not fo eafily 

 foluble, is not foon exhaufted. An addi- 

 tion of an animal or putrefied vegetable 

 fubftance to thefe light foils, would remedy 

 this defect. 



SECT. 



