U A SYSTEM -OF 



1. Tranfparent, from the Eaflern coun- 

 tries. 



2. Opaque. 



SECT. XVI. 



B. Gypfum of a fcaled or granulated ftruelure, 

 Gypfum parti culls micaceis. This is the com- 

 mon Plafter-ftone. 



i. With coarfe fcales. 

 a. White, is found in the copper-mines 

 of Ardal in Norway, where this ftone 

 is the country for the copper-ores. 



2. With fmall fcales. 



a. Yellowifh, from Montmartre near Paris, 



b. Greyifh, from Speremberg in the Mark 

 in Germany. 



SECT. XVII. 



C. Fibrous Gypfum, or Plafter-ftone, impro- 

 perly (though commonly) called Englifh 

 Talc by our druggiits, Gypfum fibrofum. 

 jllabaftrites. 



1. With the fibres coarfe. 

 a. White, from Livonia. 



2, With fine fibres. 



#. White, is found in very thin ftrata in 

 the alum rock at Andrarum in the pro- 

 vince of Skone. 



SECT. XVIII. 



Z) ? Spar like Gypfum, Gypfum fpatofum. Se- 

 lenkes. This by fome is alio called Glacies 

 JMarije, and is confounded with the clear and 

 pranfparent Mica, Mica alba pellucida (Seel. 

 pcci¥v) ? 



I. Pqrc 



