Salts* 193 



Schlutt. 638. According to Mr. Cronjlcd> 

 the blue vitriol of Gojlaar contains a mixture 

 of zinc. 



SPECIES X. 



Vitriol of Zinc. 



Its colour is white, it requires little more 

 than twice its weight of water to diffolvc it 

 in the temperature of 60; its fpecific gravity 

 is about 2,000 ; it mixes uniformly with 

 vitriolic neutral falts, but precipitates nitrous 

 or marine felenites from their folutions, 

 which afcertains its acid principle; it is itfelf 

 precipitated whitifh by alkalis and earths, but 

 not by iron, copper, or zinc, which fuffici- 

 ently indicates its bafis ; if it contains any 

 other metallic principle, this may be precipi- 

 tated by adding more zinc, except iron, 

 which will of itfelf precipitate by expofure to 

 the air, or boiling in open air. 



100 parts of vitriol of zinc, contain 22 acid, 

 20 of zinc, and 58 of water. 



This fait is fometimes found native, mixed 

 with vitriol of iron, and in the form of white 

 hairy cryftals, 2 Linne <uon Gmelin^ p. 3 1 6, or in a 

 ftala&itical form in the galleries of Mines in 

 Hungary^ Gojlaar, &c. or as an efflorefcence on 

 ores of zinc ; it is alfo found diffolved in mine- 

 ral waters, and generally with fome propor- 

 tion of the vitriols of iron and copper, 2 Bergm. 



O 318, 



