NOME I. SIDERITE, WITH GARNET ROCK. J J 



in a vase of crystal: but when a science 

 has assumed a new aspect, like chemistry, 

 or is wholly new, like mineralogy, new 

 words become indispensable to express 

 new ideas. 



For the sake of memory, and easy re- 

 ference, the latter divisions follow the 

 general succession of substances in the 

 former : but this arrangement must not be 

 understood to imply that any substance is 

 predominant, as either may have greater 

 or less importance in different parts of 

 the same rock. After these considerations, 

 the proper arrangement of the Composite 

 Rocks will not be attended with much 

 difficulty. 



NOME I. SIDERITE, WITH GARNET ROCK. 



Siderite and garnet are substances of similar 

 origin, alike influenced by iron; and their con- 

 junction is naturally to be expected. Nodules 

 of garnet rock may appear in a rock of siderite, 

 or the reverse ; but both are so equally balanced, 

 that it would be improper to class them under 

 either Mode, X^sFtlRR 



(, UNIVERSITY ^ 



