On the Barytes Mines. 125 



pounds of barium are to a small extent soluble in water, and 

 would be brought down through the strata to rise again from 

 deep-seated springs. Meeting now with soluble sulphates, these 

 salts of barium would be converted into sulphate, and as the 

 water cooled in rising to the surface, this would be deposited. 

 As a matter of fact crystals of sulphate of barium have been 

 found on the granite of Carlsbad, where a hot spring, con- 

 taining in solution traces of that substance, burst out. Chloride 

 of barium is sometimes noticed in spring waters, and this would 

 also give rise to sulphate in the manner pointed out. 



In fact it is only through the medium of hot water that the 

 sulphate of Barytes of Bantry, and the very insoluble minerals 

 associated with it, can be supposed to have been deposited. 



