TAB. CXVII. 



STRONTIA sulphata. 

 Sulphate of Strontian. 



Class 2. Earths. Order 1. Homogeneous. 



Gen. 6. Strontia. Spec. 2. Sulphate of. 



Div. 1. Crystallized, 



Spec. Char. Strontian in combination with Sul- 

 phuric Acid. 

 Syn. Schewefel Saurer strontianit. Emmert. 3. 312. 



Strontiane. Daubenton, tab. 19. 



La Cselestine. Brochant, 1. 640. 



Strontiane sulfatee. Rally ^ 2. 313. 



Some time in the year 1794 Mr. Tobin, of Bristol, first 

 showed me, and was so good as to give me specimens of 

 Sulphate of Strontian, from Redland, near Bristol; and it 

 had been then but recently discovered, I believe, by himself, 

 and was very little known. This was about the time Mr. 

 Kirwan published his Elements of Mineralogy. We were 

 next indebted to Mr. Clayfield for specimens, who, in 1797, 

 discovered it at Aust Passage, near Bristol. The present 

 figure is partly from one of his specimens. He observes 

 that he discovered detached veins in different parts of the 

 cliff. The strata in which the veins are found are nearly 

 horizontal, consisting of Limestone of different hardnesses, 

 and argillaceous Sandstone intermixed with Clay and 

 Gypsum, and some of the fissures were filled up with 

 Sulphate of Strontian from 3 to 12 inches in thickness. 



