450 CHARACTERISTIC. CLASS III. 



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

 G. = 1-0 ... 1-1. 



Amber. iii. 57- 



2. BLACK. Solid ... fluid. 



Colour black, brown, red, grey. v 

 Streak black, brown, yellow, grey. 

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

 G. = 0-8 ... 1-2. 



Black Mineral-Resin. J. iii. 59. 



Retinite. iii. 146. 



II. ORDER. COAL. 



I. MINERAL-COAL. Amorphous. 

 H. = 1-0 ... 2-5. 

 G. =1-2 ... 1-5. 



1. BITUMINOUS. Colour brown, black. 



Lustre resinous. 

 Odour bituminous. 

 H. = 1-0 ... 2-5. 

 G. = 1-2 ... 1-5. 



Bituminous Mineral Coal. J. iii. 61. 



2. NON-BITUMINOUS. Colour black. 



Lustre imperfect metallic, 

 Odour not bituminous. 

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

 G. = 1/3 ... 1-5. 



Anthracite. iii. C4. 



Among the remaining minerals contained in the Appen- 

 dix, ' Professor MOHS proposes to form two new Orders, 

 which will comprehend nearly the following species : 



