i9<* OF THE ASBESTINE EARTH. 



cies occurs of a greenifh white, with flender 

 parallel threads, tranfparent, and brittle like 

 glafs, and in other rcfpecls very fimilar to the 

 albedos of Baftnxs already defcribed. 

 Cronfledt's Min. 5 74- " 



EXP. 38. It is converted by fire, in a cruci- 

 ble, into a white fcoria. 



EXP. 39. In the flame of a blow-pipe, it 

 melts with ebullition into a Hag; dittolvci with 

 borax and with the microcofmic fait, but with 

 the latter more ilowly ; and eftcrvefces in its uni- 

 on with the mineral alkali. 



EXP. 40. The analylis of it produces in a 

 centenary, of terra ponderofa.o; aerated chalk, 

 6; aerated magnefia, 12.7; clay, a; filiceous 

 earth, 72; and calx of iron 7.3. 



xiv. TJJC fibrous Schorl of Zittcnbal. 



AT 7illerthal in Tyrol is found a beautiful 

 fchorl of a green colour, with prifmatic fibres, 

 brittle, tranfparent, not quite parallel, but com- 

 bined in fevcrai little bundles, diverging from a 

 centre. Small pieces of it cut glafs. 



Cronftedt's Min. 74. b. 



