itfti ON A N ATUIUL SYSTEM 



dies, and other fubRances immerfed in theuv 

 without any alteration of their original form. 



Or THE DIFFERENT SPECIES. 

 } cvn. Specific Characters of Salts. 



SPECIFIC characters :irc to be determined by 

 the difference in the nature of thole 11 m pic falts, 

 which art has not been able to compofc from 

 their principles. Of thefe, t\vo dillincl genera 

 only are known ; the acid and the alkali alrea- 

 dy mentioned. 



cvni. Species of'Aclth. 



THE genus of acids is very extenflve. The 

 vitriolic, nitrous, and muriatic, have been ex- 

 tracted from foinis.for many ages pad ; but the 

 difcovery of others diilering evidently from thefe 

 has been made within a much later period. The. 

 acidoftiuor, borax, arfenic, ilderitc, molybdc** 

 na, and lapis ponderofus, are of this defcrip- 

 tion *. 



cix. Vegetable Acids. 



WE have the profpeft as yet of a more cxten- 

 five field in the acids of the vegetable kingdom. 



Befides, 



41 For metallic aci&> fee EfTuys, t. ill. x 



