OF THE ASBESTINE EARTH. 195 



XII. OfthcdJl'cJlosofPchrfbcrg. 



AT Pehrfbcrg in Vcrmcland, we meet \vith 

 an afbeftos of a dark colour, with rigid parallel 

 fibres, that can fcarcc be feparatcd, or admit 

 of being further divided. 



Cronftedt's Mineralogy, 105. 



EXP. 35 and 36. In the flame of a blow-pipe 

 it becomes white, and leaves a white feoria ; 

 which is rather extraordinary, as it contains a- 

 bove Vo j of iron. 



EXP. 37. By analyfis we obtain, of terra pon- 

 dcrofa, o; aerated chalk, 12; aerated magnc- 

 fia, 13.7; clay, 1.7; lilieeous earth, 62; and 

 calcined iron, 10.6. 



xin. The fibrous Schorl of Grange. 



As the fibrous Shorls very often bear fo ftrong 

 a rcfemblancc to the afbefti, that they arc with 

 difficulty diilingui/hed from them by their exter- 

 nal appearances, it may not be improper to ex- 

 aminc the competition of both the one a?nd the 

 other variety, which, from their outward cha- 

 radcr, ought naturally to be referred totheclafs 

 of fchorls. In the parilli of Grange, fuch a fpe- 

 ]N T 2 cies 



