Tabular View of an Arranf/etnent of Minerals. 377 



Genera. 1. Orpiment (Auripigment or Rauscligelb). 2. Realgar 

 or Rauschroth. 3. Sulphur. 



CLASS III. M. 



PflYTOGENOUS MINERALS. H. 



Minerals chiefly formed of mineralized vegetable matters. 

 Characters of the Class. — Specific gravity less than 1'8. If 

 liq^uid, the smell is bituminous. If solid, is tasteless. 



Order I. RESIN. 



Fluid and Solid. Hardness = 00— 2-5. Sp. gr. = 08 = 

 1'6. If sp. gr. = 1-2, and more, the streak is white and 

 grey. 



Genera. Mellite, or Honeystone. 2. Mineral Resin. 



Order II. COAL. 



Solid. Streak brown, black. Hardness = 1-0 — 25. Sp. 

 gr. = 1-2— 2-2. 



If the specific gravity = 1-4 and more, the streak is black, 

 and without considerable lustre. 



Genera. 1. Black Coal, 2. Brown Coal, 3. Anthracite. 

 4. Graphite \ 



