SALT. 
444 
hundred feet above the surface of the earth, without 
any fissure, crevice, or separation into layers, or 
beds. This immense block is about a league in 
circumference, and rises as high as any of the neigh- 
bouring mountains : how far it may be sunk within 
the earth must be for ever unknown. 
We have thus enumerated the principal mines of 
salt, though almost every country contains more or 
less of this mineral; and among others Peru deserves 
to be named on account of the remarkable position 
of its mines, which are situated in the most elevated 
part of the Andes. 
