286 



Mr. Levy on the 



Primitive form. — A regular six-sided prism, in whicii one 

 side of the base is to the lateral edge in the ratio of 1 to 0,37. 

 Cleavage. — Parallel to all the faces of the primitive form. 

 Bi-carbonate of Potash. 



Incidences. 



mont 103° 41' 



onfc' 126 51 



Ai on f 150 50 



^onm 127 33 



6> on m Ill 5 



Primitive form. — Aright oblique-angled prism of 103° 41', 

 in which the three edges b, c, h are nearly in the ratio of the 

 number 1, 2,03 and 0,762. 



Cleavage. — Parallel to the lateral planes of the primitive, 

 and also to a plane passing through the two edges ^r. 

 Chlorate of Potash. 





Incidences. 



monm 103° 55' 



P 105 34 



fci 141 57 30" 



e'onP 129 50 



Primitive form.— An oblique rhombic prism, the lateral 

 planes of which are inclined at an angle of 103° 55'; and the 

 base, upon each of the lateral planes, of 105° 34'. The lateral 

 edge is very nearly equal to one side of the base. 



Cleavage. — Parallel to all the faces of the primitive form. 



