89 



TAB. CCCXLIX. 



ZINCUM sulphatum. 

 Sulphate of Zinc. 



Class 3. Metals. Order 2. Oxygenized Compounds, 

 Gen. 4. Zinc. Spec. 1. Sulphate. 



Div. 1. Crystallized. 



Spec. Char. Oxide of Zinc combined with Sul- 

 phuric Acid. 

 Syn. Vitriol of Zinc. Kirw. 2. 23. 

 Zinc sulphate. Haiiy, 4. 180. 



Sulphate of Zinc is found at Holywell in Flintshire ; 

 and the specimens which I have were hrought from thence. 

 It is formed on a red earthy Oxide of Iron, and is chiefly 

 distinguished from the Sulphate of Iron, or Copper, by its 

 whiteness, being commonly called White Vitriol and even 

 White Copperas. I have not seen it crystallized in its native 

 state. It is slightly laminous in its fracture, and is formed 

 rather irregularly in holes or foramina. It is soluble in 

 twice its weight of cold water, and has a strong styptie 

 taste. When pure it consists of 



Oxide of Zinc . . . 40" 



Water 39*5 



Sulphuric Acid . . . 20-5 



100-0 



