C 154 3 



N. ZINC. 



ZINC is about 7 times heavier than water; it is 

 foluble in the nitric, fulphuric, and muriatic acids, 

 and produces by the two laft hydrogen gas or in- 

 flammable air; it burns with a bluifh green flame 

 when expofed to red heat, and fublimes in the 

 ftate of a white light fubftance ; it precipitates 

 lead and other metals, in a metallic ftate, from 

 their folution. When in an oxyde ftate, is reco- 

 vered by charcoal in a clofe veffel. It is found 

 in various parts of Europe, never in a perfect 

 metallic ftate, but generally in the ftate of calx or 

 oxydated ; frequently alfo combined with iron 

 and fulphur. It is of a fibrous texture, and of a 

 bluifti grey colour. 



a. Native Oxyde of Zinc, calamine, calx of 

 zinc. Anal. Oxyde of zinc, 84. Oxyde of 

 iron 3. Silex 12. Argill u Bergman. 



Synonymous Names, 

 f Chalk of Zinc. 



b. Carbonate of Zinc A Aerated Zinc. 



^Mephite of Zinc. 



Oxyde or Calx of Zinc, combined with, or mi- 

 neralifed by fixed air or carbonic acid. Is per- 

 fectly foluble in fulphuric acid, without emitting 

 heat ; the fixed air is discovered by the efFervef- 

 cence which takes place when diffolved in the 

 fulphuric acid, and the zinc combining with the 

 acidj forms 



c. Sulphate, 



