64 



EARTHS. TALCOSE. i. Talcum, 



brtan%oni- 

 cum. 



radiatum. Silvery, of a greafy luftre, compofeJ of flexible ftellatc 

 plates. 

 Found in the valley olTremola in Stvitzerland, 



cQsffieticum. Soitiewfiat flexible, diaphanous, undulately lamellous, fhin- 

 ing, breaking into difcoid fragments. 



Mica talcofz. Syli. nat xii. 3. p. 59, n 7. 



Talc. Kirnxian i. ^.1^0. Schmei/Jer \. p 194. 



Talc. ThoTH/on chomijiry, 'i^. p 541, 



Found in Nap/c, Saxony ^ Sileda^ Tyrol, and S^vceden: colouf 

 pale green, filvery, greenifh grey, green, red, yellow, or 

 yellowifh : llror.gly heated it hecomes whiter, leis tranfparent 

 and more brittle : contains fi'ica 48. o alum na 37. o oxyde 

 of iron 6.0. magnefia 1.5. lime 1.5. w^ter 5. o. 

 Chene-vix, 



Rigid, without tranfparency, leaving a mark, very mi- 

 nutely lamellous. 



Semiundurated Steatites. Kirivan mineral. 1.^.151. 



Sp-inifli chalk. SchmeiJJer mineral, i. p. 1 94. 



Found in amorphous mnfles in France and Spain: colour white! 

 orgreenilh: abforbs but does not diffuie itlelf in water; 

 hardens and whitens in the fire: cont:iins filici 48. 42. mag- 

 iieiia 20. 84. alumina 14* iron i. air and water 16. Klapr, 



Rigid, without tranfparency, fhining when rubbed, leav- 

 ing a white mark, of thivery fia6ture, fubdiaphanous^ 

 apyrous. , 



Talcum ungue rafi'e. Syft. nat. xii. 3. p. 52. n, 4. 



Soap {i )ne. SchineiJJer mineral, i p. 192. 



Steatite^. Kirnaan, \, p. 151. Thomjon chem, 3, p, 590. 



1. More f3lid and opake. 



2. More folid and diaphanous. 



3. Softer and fubdiaphanous. 

 ^4, Softer and fubopake. 



5. With hexaedro-prifmatic cryftals terminating in a 6-fided py^ 

 ramid. 

 Found in Corn^vall, China, Noriuav, S<weden, Saxony, and Ger^ 

 mary : colour white or greenifh- white, gre)i{h-green, ve>- 

 lowifh', or reddifh, fometimes veined: does not adhere to rhtf 

 tongue : foft and foapy, and may be cut into any fhape i It 

 melts with borax and foda into a greenifh flag. 



Rigid, opake, without tranfparency, undulately lamellous, 

 breaking into difcoid fragments. 



Talcum opacum folidum, Syli. nat.iin. 3. p. 52. ». 5. 



Pot-ilone. Kirauan, \.p. 155. SchmeiJJery i, p, 196, 



Pot-itone. Thorn/, chemijl, ^ /» 582. 



Fwund imbedded in amoiphru'- maff.'s in RuJ/j.y, Nomi'ay, SaxoTty, 

 and many ^zn?, o^ Europe : colour pale yellowifh, or greenifh- 

 grey, reddifh-grey, or fpeckled with red, and contains many 



Sniediis, 



5//- 



eiians. 



