414 CHARACTERISTIC. CLASS II. 



H. = 3-5 ... 4-0. 

 G. = 6-9 ... 7'3. 



Rliomloidal Lead-Spar. J. ii. 133. 



p 



3. HEMI-PRISMATIC. Hemi-prismatic. = 119 0'. 



Inclination = 12 30 7 . 



Cleavage, P + o> = 93 40'. Pr + os. Pr 4- *. 

 Streak orange yellow. 

 H. = 2-5. 

 G. = 6-0 ... 6-1. 



Red Lead-Spar. J. ii. 137- 



4. PYRAMIDAL. Pyramidal. P = 99 40', 131 35'. 



Cleavage, P. Less distinct P oo. 



H. = 3-0. 



G. = 6-5 ... 6-9. 



Yellow Lead-Spar. J. ii. 140. 



5. PRISMATIC. Prismatic. Pr = 104 55'; (Pr -f cc) 3 = 



78 45'. 



Cleavage, Pr = 76 11'. Pr + oo. 

 H. = 3-0. 

 G. = 6-2 ... 6-3. 



Sulphate of Lead. J. ii. 142. 



p 



6. AXOTOMOUS. Hemi-prismatic. - = 72 3C'. In- 



clination = 29'. 



Cleavage, P oo, perfect and eminent. 

 H. = 25. 

 G. = 6-2 ... 6-4. 



Sulpliato-tri-Carlonate of Lead. BROOKE. ii. 144. 



VI. ANTIMONY-BARYTK. Prismatic. 

 H. = 2-5 ... 3-0. 

 G. = 5-5 ... 5-6. 



1. PRISMATIC. Prismatic. Pr = 70 32'. 



Cleavage, (Pr + oa) 3 = 136 58', highly perfect. Pr 4- oo. 



