18* OF THE ASBESTINE EARTH. 



iron*. This method is very convenient: For, 

 fliould the magnefia be added in too large a 

 quantity,. the excefs will fubiide to the bottom 

 whiter and heavier than before, fo that the a- 

 lum, which is neither lo heavy or fo light co- 

 loured, may eafily be feparated from it by 

 vvalhing. In the experiment that was made in 

 this manner, we obtained 3.3 of r.rgillaceous 

 .earth. 



In the analyfis of the following varieties this 

 method was continued. 



in. Of AJbcftK tf Swartvlk, 



MANY remarkable varieties of this afbeflos 

 occur at Swartvik, in the parifli of Swerdfio in 

 Dalecarlia; two of which we fliall now proceed 

 to confider, 



Thefirft is wiiite, anddivifible into the fineft 

 flexible fibres. Mixed with which are found lit* 

 tie bundles harder arid ferruginous, that were 

 however feparated from them, uj> more impure, 

 and more charged with iron. 



Cronilcdt's Mineralogy, g 106. 2. 



Its character on being expofed to the fire, 



Exp. 7. By calcination it becomes rather 

 whiter in the crucible. With a greater heat it 

 runs into a general mais of a martial colour. 



Analj-lls of Lithomargc. 



