86 British Miner'alogicat Society* 



penetrate, and about two feet thick. The vein runs north* 

 east, and the specimen was taken four fathoms from the 

 surface. 



The analysis, by Mr. W.H. Pepys, jun. gives in 200 parts, 

 Iron r -r 30*9 



Silex - 92 



Argil - -. 28*5 



Sulphur and oxygen - 27"6* 



Specific gravity 2*94. 

 The proprietor is Mr.Crighton, of the island of Shetland. 

 The second specimen was from Carnarvonshire, a sulphate 

 of barytes found equal with the level of the earth near the 

 fbot of a hill in that county. 



The analysis, by Mr. Knight, yielded in 400 parts, 

 Sulphate of barytes - 352 



Silex r - 17 



Loss - - 30 



Specific gravity 4*028, 

 The proprietor Mr, S. Holland. 



The third specimen was an iron pyrites found near the. 

 same spot with the last. 



The analysis, by Messrs, Til}och and Pepys, gave in 100 

 parts, 



Iron - - 47 



Sulphur - r 34 



Argil - r 8 



Loss t - 1Q 



Specific gravity 4*512. 

 Proprietor Mr. S. Holland. 



The fourth specimen is from Hawes, near Winsly Dale, 

 Yorkshire, above t\\e earth, forming for some way a path 

 or road. 



Mr. Charles Aikin's experiment proved it to contain 

 4 per cent, of copper in sulphate of barytes. It may, therer 

 fore, he considered nearly a pure sulphate of barytes. 

 , Specific gravity 4*20. 

 The proprietor Mr. J. Hillary, of Yorkshire. 

 The fifth specimen is a silver from the Herland mine in 

 Cornwall, in the parish of Gonnear, about seven miles west 

 of Redruth, and near the direct road from thence to Penr 

 ^ance. 



The first discovery of silver was made at 100 fathoms from 

 the surface in a cross-course which angles the copper lodes. 

 The silver is found about eight feet in length on each side 

 of the latter, and it continues in depth as they sink the 

 mine, which is now 145 fathoms^ 



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