DOMAIN IX. ANOMALOUS. 



waters, or deposited by them, or appearing 

 as mere efflorescences, or at the most in a 

 gemmose form. And as the important and 

 interesting study of Crystallography, or 

 Chrystallogy, originated from the observa- 

 tion of the salts, they may be considered as 

 belonging to that department of Lithology. 



But the Combustibles stand in a differ- 

 ent predicament, for coal is, in many coun- 

 tries, a very common and abundant sub- 

 stance; is found in vast beds, like many 

 other rocks ; and may be said to constitute 

 entire hills, as that of St. Gilles, near Liege. 

 In this new point of view, therefore, coal 

 has been ranked among the rocks; and 

 that division also includes the bituminous 

 substances, which ouse from them, or may 

 be found in their recesses; while amber 

 and mellilite remain almost alone for the 

 minute investigations of the gemmologist. 



In passing to the sulphuric substances it 



must be observed, that a most common 



pyrites, and general appearance of sulphur, in py- 



rites, is so interwoven with most of the 



rocks, that it forms an important feature 



