British Mineralogical Society. S7 



It was an abandoned copper mine about 67 years baek. 

 It had lain unwrought from 1 762 till that time, and had 

 turned up great profit to the former adventurers. 

 Specific gravity 4*464. 

 The analysis, by Mr. William Allen, gives in 100 parts. 

 Silver * , - 2-152 



Iron - 27*500 



Sulphur and arsenic, 26*600 



Silex - - 32*400 



Loss - 11-348 



100-000 

 The specimen we received was from one of the propri- 

 etors, Mr. William Phillips. 



The sixth specimen was a green carbonate of copper dif- 

 fused through an ochrey clay in compact quartz from a 

 mine in the parish of St. Neots, in the county of Cornwall, 

 at the depth of 30 fathoms from grass. 

 Specific gravity 3*078. 

 The seventh speciin^n is from the same mine. 



Specific gravity 2*985. 

 Specimens 6 and 7, being already worked, are not sub- 

 jects for the investigation of the society. 



Their value is reckoned by the proprietors at 12l. per 

 ton, when copper in the metallic state sells at 1351. per ton. 



The eighth specimen is a copper and iron pyrites in 

 quartz, found on the surface of the earth, county of Cum- 

 berland : the specimen obtained by pick-axe. 

 Spec, gravity 3*788. 

 The analysis by Mr. T. Cox in 400 parts of the-ores, 

 Copper - - 125 



Iron - - 139 



Silex - - 68 



Sulphur - - - 40 



Loss - - 28 



The proprietor is Mr. W. Monkhouse of Cumberland. 

 The ninth specimen is a peculiar arrangement of pyrites 

 found on the coast of Africa among the stones on the 

 beach. 



On analysis by Mr. R. Phillips it was found to contain 

 in 100, 



Iron - - 43 



A 1 umine - - 12 



Silex 9 



Sulphur and oxygen •■> 36 



The proprietor Mr. J. Bolts. 



F 4 Specimen 



