. "(aaa 
Rotien-Stone. §27 
the original stone.—The local circumstances, 
however, attendant on Rotten-stone must 
prevent such a supposition from being adopt- 
ed.—aAll limestones, it is true, are liable to 
decomposition ; and the black seem to be more 
subject to this process * than the lighter. 
N. B. It is to be regretted that this paper 
was left in an unfinished state, owing to the 
death of the ingenious author, and that several 
of the notes, referred to, have not been disco- 
vered amongst his manuscripts, though these 
have been examined with very great care and 
attention. 
* Vide Note. 
