C 60 ] 



CLASS J. EARTHS. 



ORDER I. TALCOSE. 



J. Talcum, Grcafy to the touch. 



2. Serpentinus. Dry and harlh, of a fhivcry fracture, with- 



out luftre. 



3. i'^SBESTUS. Dry, fibrous, without luftre. 



4. AcTiNOTUS. Dry, (hining. 



5. HoRNBLENDA. Dry, lamellous, black. 



ORDER II. PONDEROUS. 



6. Barytes. Soluble in boiling fnlphuric acid. 



7. Crossopetra. Not totally foluble in fnlphuric acid. 4 

 is* Strontia. Soluble in marine and diluted nitric acids. 



9. Sydneia. Soluble in muriatic acid, 



ORDER III. CALCAREOUS. 



10. Creta. Soling the fingers. 



11. Tophus. Porous, precipitated from water, i 



12. Spatum. Lamellar, breaking into rhomboidal frac^ 



tures. 

 13.SCHISTOSPATHUM. Undulately flaty. 

 14. Inolithus. Fibrous, foluble entirely with effervefcenc^ 



in nitric acid, 

 l^. Stalactites, Precipitated from water in the air. 



16. PisoLiTHUS. Confiding of globular granulations. 



17. Marmor. Compa£l or granular. 



18. SuiLLUs. Emitting an urinous fmell when fcraped. 



19. Tremolites. Radiate, partly foluble in nitric acid. 



ao. Stellaris. Fibrous in a ftellate manner, eafily melting 



in fire, 

 21, Humus. Friable, becoming very pale when dry. 



22 Marga« Hardening by fire, and vitrifying in a greateir 



degree of heat. 



23. Magnesiata. Becoming black in the fire. 



24. Picrospatum. Lamellar, brittle, flowly eiFervefcing with 



acids. 



25. Gypsum. Calcinable with water, hardening in the ai^. 



