EARTHS. TALCOSE. i. Talcum. 63 



ORDER I. TALCOSE. 



• 



i. TALCUM. Confiding principally of carbonate 

 of nnagnefia, and filica and carbon: fofc, greafy 

 to the touch, not admittmg a polifh : hardening 

 in the fire, not effcrvefcing with nitric acid, ab- 

 forbing oil. 



Spuma }na- Whitifh, tt nacious, hardening in the air. 

 ris, Argi'la Jithoinarga. Sj/L?iat.xh 3 /> 201. «, 5. 



Keffekil. Myrfen. Kirn.van mi*teral. \. p. 144.. 

 Spuma mans. SchmeiJJcr minvral 1,^,209. 

 IvifFckil. Sea-froth. 1humfonsChemtftny\mp*^^C)* 

 Found in fiiiall veins covered with foil in Anatolia, near Konit 

 I Thrace ) GreecCy ^Tidi North America: colour white and yellow- 

 ilh white: confiilence waxy when fr e fh : adheres to the 

 tongue, and abforbs water: fpecific gravity i. 600 contains 

 filica 50 50. magnefia 17 29. water 25. oo. carbonic acid 

 5, 00. lime . 50 Klnpr. It is uled to make the bowls oi 

 Turkifn tobacco pipes, 



fulknum. Tinged, tenacious. 



Hoffmann Ber^r^m* "Jcurn. 1789, I. p, 157. 



Found in Corn<vjall and Bedfordjlire^ Pcrtugal and Saxo:-'w in 

 large malfes under t^.e common foil: colour yellowifh or 

 grcenifh-grey, greenifh-white, green, or flefli-colour. Is 

 ufed to take ipots of greafe out of cloth. 



porcellanum White with a caft of green, tenacious, forming porcelane 



in a greater degree of heat. 

 Guettard ifj Lanjoifeer Jd. Parisj lyy^ p. 433,434. 

 Martial muriatic fpar. Kirnvafi mineral. i,p. 14^. 

 Found in Lorrain at the depth of 30 feet, in ftrata of 7 or 8 feet j 



and is ufed by potters in the manufacture of porcelane. 

 tblmtes. Friable, fcaly, green, gives an earthy fmcl! when breathed 



upon, melting with a greater heat into a dark brown 



glafs. 

 Chlr.rire. Peich, Kirivan mineral. \. p. 147. 

 Chlorit. SchneiJJer mineral. \~ p ig6, "-l hcml chem. %. p. f^%i.. 

 Found in S'vjitiZ'^rlanci and. Saxofiy, in piiniitive inounrainf and 



rock cryftal : colour grafa or dark-green : has a fcaly texture 



and glittering appearance. 



sqUamoium. Friable, fcaly, apyrous. 



hi'.fftnann Berg.yourn, 17B9. i.^ 160, 

 Found near Freybur^ in Saxony, 



