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The Gondii flow. $6 j 



And fines wc find Co great a quantity of 

 air infpircd and mixt with the Cap , and 

 wrought into the fubftancc of vegetables , 

 the advantage of ploughing and fallowing 

 ground feems to arifc not only from the 

 killing the weeds, and making it more mel- 

 low, for the Ihooting of the roots of Corn 5 

 but it is thereby alfo the better expoicd to 

 have the fertilizing, fulphureous, acreal and 

 acid particles of the air mixt with it, which 

 make land fruitful, as is evident from the 

 fertility which the fword or furface of land 

 acquires, by being long cxpofed to the air, 

 without any culture or manure whatever. 



We have fecn many proofs of the great 

 quantities of liquor imbibed and pcrfpired 

 by plants, and the very fenfible influence 

 which different (fates of the air had on their 

 more or lefs free perfpiration : A main 

 intention therefore to be attended to in 

 the culture of them, is to take due care, 

 that they be fown or planted in proper 

 fcafons and foils, fuch as will afford them 

 their due proportion of nourifhment ; which 

 foils, as they are cxhaufted, mud, as 'tis well 

 known, from time to time, be replcnifhed 



' with freih compoft, fuch as is full of falinc, 



fulphu- 





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