W. Sxry.—Formation of Gold Nuggets in Drift. 383 
generally present in waters situated at some depth in our rocks, we may very 
reasonably suppose that a portion, if not all, of our gold has been brought into 
solution by these agents. 
The state to which such auriferous solutions might pass when exposed to 
air and carbonic acid is not easy to determine, but of this we may be certain, 
that it could not well be one unfavourable to the exercise of the reducing 
properties of metallic sulphurets upon the gold compound present in them. 
