CERUSSITE CRYSTALS FROM BROKEN HILL AND MULDIVA. 



299 



accuracy for the orientation is not claimed. The chief 

 forms present are b (010), r (130), y (102), k (Oil), x (012), 

 the two last much striated; i (021), o (112), and p (111) 

 are also represented, and m appears as striae in r. 









Fig. 4. 







Segment. 



Vo 



Limits. 



Number of 

 Observations. 



</>o 



I 



316° 58 



316° 51 - 317 3 



4 



o / 







II 



14 18 



14 8 - 14 28 



5 



57 20 



III 



70 30 



70 25 - 70 33 



5 



113 32 



IV 



19 12 



18 48 - 19 24 



5 



62 14 



V 



76 24 



76 2 - 76 40 



4 



119 26 



VI 



77 31 





1 



120 33 



VII 



134 52 



134 42 - 135 3 



7 



177 54 



VIII 



192 8 



192 5 - 192 11 



2 



55 10 



IX 



320 19 





1 



3 21 



X 



17 36 



17 35 - 17 36 



2 



60 38 



XI 



24 32 



24 23 - 24 40 



5 



67 34 



XII 



81 48 





1 



124 20 



Calc. for r-twin 



57° 18'. 



The r-twins can be easily distinguished as those tabulated 

 below : — 



Segments. Meas. b a b 



I, II 57° 20' 



IV, V 57 12 



VI, VII 57 21 



VII, VIII 57 15 



IX, X 57 17 



XI, XII 57 16 



