Zinc. 323 



tranfparency, or opake ; when fcraped with 

 a knife in the dark, it emits light, even in 

 water, and after undergoing a white heat, 

 when diftilled per fe, a filiceous fublimate 

 rifes, which fhews it contains the fparry acid, 

 probably united to a metal fince it fublimes. 

 It is almoft wholly foluble in the marine 

 acid in a boiling heat. 



Mr. Bergman found i oo parts of that of 

 Scharjenberg, to contain 64 of zinc, 5 of iron, 

 20 of fulphur, 4 of fluor acid, 6 of water, and 

 i of filex. 



V. VARIETY. 

 Greyifh yellow Blende. 



22. This confifts of a mixture of blende r 

 galena, and petrol, it contains about 24 per 

 cent, of zinc ; it is probably the fame as the 

 grey blende of Monnet Mineral, p. 40x3. 



VI. VARIETY. 

 White Blende. , 



23. Found at Sifoerberget Cronfl. . 230. 



VII. VARIETY. 

 Tellow Blende. 



24. Of the colour of wax, and femi-tranf- 

 parent, contains much fulphur, Mon. 400. 



2 ' 25.' 



