XXXU TABULAR VIEW OF 



Gen. II. COBALT-MICA.. (M.) 

 Sp. 1. Diatomous 39 Cobalt Bloom. 



Gen. III. Pyrosmalite-MicA. (B.) 

 Sp. 1. Hexagonal (B.) Pyrosmalite. 



Gen. 17. IRON-MICA. (M.) H. 2-0... 2-5. G. 2-6 



...2-7. 



Sp. 1 . Prismatic (M.) Vivianite. 



2. Rhombohedral (S.) Cronstedite. 



Gen. V. GRAPHITE-MICA. (M.) 

 Sp. 1. Rhombohedral (M.) Plumbago. 



Gen. VI. TALC-MICA. (M.) H. 1-0... 2-5. G. 2-4 



...3-0. 



Sp. 1. Prismatic (M.) Talc. 



2. Rhombohedral (M.) Mica. 



Gen. VII. GYPSUM-MICA. (S.) H. 1-0... 3-5. G. 



2-3... 3-0. 

 Sp. 1. Rhombohedral (S.) Native Magnesia. 



2. Prismatoidal (S.) Gypsum,. 



3. Prismatic (S.) Anhydrite. 



4. Diatomous (S.) Haidingerite. 



5. Hemi-prismati c (S.) Pharmacolite. 



Gen. VIII. PEARL-MICA. (M.) 

 Sp. 1. Rhombohedral (M.) Margarite. 



39 Aiot, through, and T^/XVW, I cleave, implying that the 

 crystals possess one distinct diagonal-cleavage. 



