440 CHARACTERISTIC. CLASS II. 



H. = 5-5 ... 6-5. 

 G. = 4-8 ... 5-3. 



RJiomboidal Iron-Ore. J. ii. 404. 



5. PRISMATIC. Prismatic. 



Cleavage, P + 03. 



Streak yellowish-brown. 



No action upon the magnetic needle. 



H. = 5-0 ... 5-5. 



G. = 3-8 ... 4-2. 



Prismatic Iron-Ore. J. ii. 410. 



6. DJ. PRISMATIC. Prismatic. P = 13937', 117 38, 77 16'. 



Cleavage, Pr = 113 2'. P + oo = 112 37'. Some- 

 what more distinct, P oo. r + oo. Altogether 

 imperfect. 



Streak black, sometimes greenish or brownish. 



No action upon the magnetic needle. 



H. = 5-5 ... 6-0. 



G. = 3-8 ... 4-1. 



Lievrite. ii. 414. 



XI. MANGANESE-()BE. Pyramidal, prismatic. 

 Streak dark brown, black. 

 No action upon the magnetic needle. 

 H. = 2-5 ... 6-0. 

 G. = 4-0 ... 4-8. 



Streak brown : G. = 4-7 and more, 



H. = 4'0 and more. 



H. above 4-0 ; the streak being black : 

 lustre in the streak. 



PYRAMIDAL. Pyramidal. P = 105 25', 117 54'. 

 Cleavage, P so. Traces of P 1 = 114 51', 99 



11', and of P. 

 Streak brown. 



