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. 
