129 



TAB. CLXVII. 



MANGANESIUM oxygenizatum. 

 Oxide of Manganese. 



Class 3. Metals. Order l. Homogeneous. 



Gen. 5. Manganese. Spec. 2. Oxide of. 

 Div. 3. Amorphous. 



In tab. 86. of this work we have figured a rare specimen of 

 Oxide of Manganese in columnar crystals. The present 

 amorphous specimen is curious on account of the variety 

 which it exhibits. It is supposed to be mostly Oxide of 

 Manganese in different states, white, brown, and black ; 

 and the manner of its mixture adds to its beauty. The 

 specimen is in the possession of Mr. Rashleigh, who re- 

 ceived it from Devonshire. I have been favoured with 

 specimens of red Manganese from the same place, where 

 there is a great variety. Besides Oxide of Manganese this 

 specimen contains in the whiter parts a tolerable proportion 

 of Carbonate of Lime, which in some is crystallized like 

 Pearl Spar, tab. 19. 



