FOURTH SPECIES. 



MENACANE. 



Menachmiite of Khwan. 

 Menacan of Werner. 



EXTERNAL CHARACTERS. 

 . ' pf'f 't'l 



Is of 3 greyish black colour, inclining somewhat to iron 

 black. 



Only met with in Very small, flattish, angular, grains, 

 which have a rough, glimrriering surface. 



Internally, moderately glisteningy with adamantine lustre, 

 passing into the semi-metallic. 



The fi'acture is imperfectly foliated, approaching to the 

 slaty. jU/ii Ijijtj 



The fragments are indeterminately angular, and sharp- 

 edged. 



Perfectly opaque. 



Is soft. 

 -Brittle, 



Retains its colour in the strcak. 



Easily frangible. 



Heavy, in a moderate degree (4,42?). 



OBSERVATIONS. 



