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A 



M 



A 



A. 



45 





T. 



V. 





De terra fimplici & fojfilibus 





Of fimple Earth, and the more compound Bodies of a terrene Nature 



1 



HIS has been generally thought to be the firft principle of all bodies, b 



juflly I will not undertake to determine : It will be iufficient in this pi 



emark, that many fubflances of 



appearance 



now obferved in the world 



and that thefe, upon a flrict examination, are found not only diff 



in 



pearance, but in qual 



alfo 



odies obferved in the composition of 

 qualities with thofe more fimple fubflai 



Nor is it lefs remarkable, that the mod compou 



a I 



■> 



d 



globe, do retain the fame nature 

 for which rcafon we lhall now difpofc 



them varioufly with the different matrixes, from whence their general properties feem 



fliew them derived 



I muft however remark, that this kind alone appears 



be 



the chief, and almoft the only pabulum, or fixed principle of vegetable, as well as 

 animal fubflances, which is fufficiently apparent from the final reduction of both. 

 What we diftinguifh here by the name of fimple earth, in its mod natural flatcs, 



feems to be compofed of fmall, fmooth part 



difunited in water 



It does not ferm 



flightly 



and readily 



wi 



h acids in any flute, and generally 

 grows lefs cohefive by fire. I have difpofed the rnofl fimple productions of this 

 kind in the two following clafles, 



viz. 



I 



Such as are merely foffil, and have not yet gone through any 





fi. Fufca Jimph 



Mould. 



* 



4. Subpinguis 



TERRA 



Sub croc e a fimpU 

 Red earth. 



Flava fimple x . 

 Yellow earth 



Bole, and Fullers earth 



5. Scbiftica. 



Barren, or fchiflic earth. 



6. Varie mixta. 



Loam. 



II 







Such as have undergone fome change, and flill retain fomething of the 



e and difpolition of the productions from which they are returned. Thefe arc ge 

 ally of a more open and broken texture, and of a more pure nature when tho 

 ghly reduced, and alone. 



TERRA 



Humofa nigra. 



Black mould. 

 Humofa radicibus in- | 4. Fimofa. 



3. Paludofa & humofa van a. 



Dung and mud. 



tertexta. 



Turf. 



Tke remains of animals. 



The productions of this 

 be thofe that are tranfp 



that approach the nearefl to the fimple flate, feem 

 or nearly fo ; and may be confidered as the effect 



of a particular fluor of this kind, which, for the prefent we fhall call fluor pellucidus 

 terrejiris : and that fuch a thing is very apparent in nature, and the cement of a 

 number of bodies, is evident from the peculiar qualities of the whole clafs, foappa- 



many of them, the productions of which are obferved to elude the action of 



acids in every flate 5 and never to give fire with fleel 



The productions of this clafs 



grow harder in the fire 





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1 °. TALCUM 





