NOME IX. SUBSTANCES EJECTED OR CHANGED. 



HYPONOME VII. SANBSTONE. 



This substance seems one of the rarest of the 

 ejections ; while, as it generally, if not always, 

 accompanies coal, if the Wernerian theory of vol- 

 canoes were just, it would be among the most 

 common. 



This arrangement of volcanic substances being, 

 from its nature, rather jejune, it may be proper 

 somewhat to diversify it by a few general remarks, 

 and some examples of singular volcanoes, chiefly 

 from Patrin and other jbreign authors, whose 

 works have not been translated. It might have 

 been thought unpardonable to have passed, with 

 irreverent brevity, some of the grandest features 

 of nature ; especially as the recent progress of 

 mineralogy has thrown new light on many topics ; 

 and the ignorance of the ancient accounts has 

 been dispelled by the precision of modern science. 



Patrin has started a singular idea concerning 

 volcanic substances in general, which is, that they 

 are created by gases ; otherwise, in his opinion, it 

 would be impossible to account for the vast quan- 

 tity of matter ejected ; and the volcanic moun- 

 tains would, long since, have sunk into- their own 



