142 Mr HAIDINGER on ike Ores of Manganese. 



compact mass is aggregated into reniform shapes, which leaves 

 numerous interstices between them. The colour is nearly the 

 same as that of the uncleavable manganese-ore, a bluish or grey- 

 ish black passing into dark steel-grey. The streak is black, with 

 a slight tinge of brown ; the place on the mineral, where it has 

 been examined, becomes shining. 



