58 ON THE PRIMITIVE FORMS OF CRYSTALS. 



Muriate of strontian. 

 Nitrate of soda. 

 10 Subphosphate of potash. 



Sulphate of nickel, certain specimens, \ probably 

 Sulphate of potash, certain specimens, J impure. 

 Super-acetate of copper and lime. 

 Ice. 



15 Apophyllite surcomposee* 

 Apophyllite from Uto. 

 Titanite*. 



IId class of primitive forms. 



Dichroite. 



Mother of pearl. 



Indurated talc. 



Sulphate of copper and iron. 



5 1 — ammonia. 



cobalt. 



ammonia and magnesia. 



soda and magnesia. 



manganese. 



10 Carbonate of ammonia. 



potash. 



barytes*. 



strontian f. 



* Haiiy makes the primitive form of Titanite a right prism, 

 with a square base ; but this form is incompatible with its op- 

 tical structure. 



t Haiiy makes the primitive form of the Carbonates of Barytes 

 and Strontian, a hexaedral prism, a form which is directly ex- 

 cluded by their having two axes. 



