I 



'i:: 



^ 



n, 



s 



J 



) 



ul 



%i 





...Jb 



y expe. 



md 



byL 



JncocT) 



ord 



'^ plains 

 ■^es, and 

 ■ fmall 



near 



are 



pan! 



"^lop. Britan. 

 'lied Lincoln 



?ree of 



pOW' 



ared in fmall 

 been diffolv* 

 •bable differ- 

 :ir antiquity, 

 'the original 

 d as Lincoln 



Ton to 



; IS rea 



\y more 



fer- 



.neftone, 



or 



) 



fphoric a 



. litneftoii^^' 



ir 



Loug 



hbo- 



III 



i 



d in 



bly 



c 



ontalii 



be 



bones 



O! 



Ol 



oat of <«'* 



Sect. X. 6. i. 



laid on it, bore crops f( 



MANURES. 



thirty years without additional imp 



213 



( 



ment, 

 Agric 



nd I think it was called Ihell-marle 



See Encyclop. Britan 



6. A medical philofoph 



M. Bonhomme, h 



deavoured to 



fhew. that th 



hardnefs of animal bones depends on the quantity of 



d 



phofphoric acid united to calcareous earth, which they contain ; at 

 that the rickets, a difeafe in which the bones become too foft, is folely 



& 



flead of 



the w^it of 

 it. AnnaleJ 



or 



to th 



ftence of the vegetable 



d 



de Chemie, Vol. XVII. May we not con- 



de, that the prefence of phofphoric acid 



the vegetable fyftem 



muft be of importan 



becaufe it fo unlverfally exifts in them, and 



well 



offeous fibres 



may probably give firmnefs to liqueou 

 To which may be added, that M. Fourcroy believes, that the afhes 

 of burnt vegetables, which have been fuppofed to confift of earth or 

 clay, when the fixed alkali is wafhed from them, are principally cal 



phofph 



like thofe of animal bones. The fame is aflerted 



by Lord Dundonald in his Connexion of Agriculture and Chemiftry, 

 25, who calls the infoluble part of vegetable afhes a phofphat of 



p : 

 lime 



This fubjed is worthy further invefl 



VI, 



LIME. 



Many of the principal ufes of calcareous earlh in promoting the 

 o-rowth of vegetables have been already mentioned in this fedion, 



to ... 



which we (hall recapitulate with additions. 



I. One great ufe of calcareous earth I fufpeft to confift in its unit- 

 ^ with the carbon of the foil in its pure or cauftic ftate, or with that 



of vegetable or animal recrements during fome part of the procefs of 



mg 



putrefaaion ; and thus rendering it foluble in water by forming an 

 hepar carbonis, fomewhat like an hepar fulphuris produced by lime 



^nd fulphur, as mentioned in No. 4. 7. of this Seft. ; by which pro- 

 cefs 



\ 



