192 



A SYSTEM OF 



1. Mixed with a calcareous fubftance, 

 Ochra veneris terra c ale are a mixta. 

 Cceruleum montamtm. In this ftate 

 copper blue is moftly found It fer- 

 ments during the lblution in aqua 

 fortis. See Seel:, xxxiv. 



2. Mixed with iron. Black. It is the 

 decompofition of the Fahlun copper 

 ore. Seel;, exeviii. a. 



b. Indurated, Minera cupri calciformis im- 

 pura indurata. 



1. Mixed with gypfum, or plafter. 

 Green. Is found at Ordal in Nor- 

 way, and there called Malachites. 



2. Mixed with quartz. Red. From 

 Sunnerfltog, in the province of Smo- 

 land. Seel:, liii. B. 



3. Mixed with lime. Blue. This is 

 the lapis ar 'menus , according to the 

 accounts given of it by authors. 



SECT. CXCVII. 



C. Diflblved and mineralifed, Cuprum minerali- 

 fatum. 



1. With fulphur alone, Cuprum fulphure mi- 

 ner alifatum. Grey copper ore. Is impro- 

 perly alfo called Gtais copper ore. 



a. Solid, without any certain texture, Mi- 

 nera cupri fulphur at a folida texturd inde- 

 terminatd. This is very foft, fo that it 

 can be cut with a knife, almoft as eafily 

 as black lead. 



b. Fine cubical, Minera cupri fulphur at a 

 teffulis conftans minor ibus. 



Both thefe varieties are found at Sun- 

 nerfkog, in Smoland \ where the laft is 



fometimes 



