C 54 ] 



an ore of this metal, from which ultramarine is 



prepared. 



c. Mountain-green, " Copper united with earth, 

 diffolved by an acid*" 



d. Glafs copper ore, hard and brittle* ufually 

 found with native copper, of a purple or brown 

 color. 



€. Grey copper ore, mineralized with fulphur 

 alone, foft fo as to be cut by a knife. 



f. Copper pyrites or mundic, yellowim or 

 greenim *, " Copper mineralized with iron, and 

 frequently with a fmall proportion of arfenic ; 

 marcafitical." Shews the rainbow colors. 



g. White copper pyrites, " mineralized with 

 fulphur, iron, and a confiderable proportion of 

 arfenic." 



Copper ores are found in moft countries, par- 

 ticularly in Sweden, Hungary, and Tranfyl- 

 vania. Japan alfo affords a fine fort of copper. 

 D. Iron is about eight times heavier than 

 water, is attracted by one of its ores called the 

 load-ftone-, loluble in all acids, alkaline folu- 

 tions, water and air. Its folution is turned of 

 a black or dark purple color, by galls and 

 vegetable aftringents. 



a. In moft clays and ochres, from which thefe 

 earths and moft precious ftones receive their 

 color. It may be even extracted from the 

 allies of moft animal and vegetable fubftances 

 by burning. 



b. Iron ochre, found in the fiflbres of iron mines, 

 and at the bottom of chalybeate fprings. 



c> Blood ftone, or ruddle, (Haematites) red, 

 brown or grey, containing a large proportion 

 of iron but is not attracted by the magnet. 



d. Chryftalline 



