c m 3 



CLASS II. 



EARTHS. 



EARTHS are fuch bodies as are inodorous, in- 

 fipid, pulverulent or friable, not flammable, fcarce- 

 ly foluble in water, unchangeable in the fire; 

 when heated, either by themfelves or with in- 

 flammable bodies, do not acquire metallic fplen- 

 dour. 



I. Homogeneous or simple Earths. 



Thofe earths which have not hitherto been de- 

 compounded, are termed elementary, homogene- 

 ous or fimple earths. Of this kind are the fol- 

 lowing nine. A. Lime or calcareous earth. B. 

 Stranthian earth. C. Baryte or ponderous earth. 

 D. Magnefia or earth of bitter fait. E. Alu- 

 mine or argillaceous earth. F. Silex or filiceous 

 earth. G. Adamantine earth. H. Jargon earth. 

 I. Sidnean earth ; this laft, however, is doubtful 

 as an elementary earth. 



A. LIU E. 



a. Pure lime, cauftic or pure calcareous earth, 

 in a ftate of mixture with aerated calcareous 

 earth, has hitherto been found only at Bath, and 

 near the craters of fome ancient volcanos. 



b. Carbonate 



