4 



I trust this matter will be discussed, as I should much like to 

 hear the opinion of Mineralogists on the subject. 



REFERENCE TO PLATE* 



1. Series of Curved Lines. 

 la. Waved Lines. 



2. Irregularly Grouped Curved Lines. 



3. Series of Oval Lines produced by Fracture. 



4. Series of Curved Lines produced by Fracture. 



* These representations are all enlarged. 



