PALACHE. — CRYSTALLOGRAPHY OF LEADHILL1TE. 441 



ir, Of (053). 



<P 9 



Crystal 1 0° 23' 61° 38' good. 



"15 1 33 61 54 poor. 



"16 46 60 34 fair. 



Calculated 16 61 39 



<f>, 02 (021). Figures 5, 7, and 8. 



<P p 



Crystal 2 0° 00' 66° 10' poor. 



"5 40 65 40 good. 



"6 00 66 34 poor. 



"6 01 66 00 " 



"8 19 65 36 " 



"9 00 66 04 " 



"9 06 65 43 perfect. 



" 12 06 65 50 good. 



" 14 14 65 43 " 



Calculated 13 65 48 



«A, Of (052). 



<t> p 



Crystal 2 0° 00' 69° 48' fair. 



" 14 10 70 13 poor. 



Calculated 11 70 13 



A, — If- (2~52). On five crystals, usually with large and distinct faces, 

 of high lustre, giving good reflection (Figures 4 and 7). 



<t> P - 



Crystal 1 —24° 54' 72° 15' bad. 



2a —24 57 71 22 poor. 



11 -24 24 71 41 good. 



" 11 —25 13 71 49 good (in twin position). 



" 12 -24 32 71 51 perfect. 



" 12 —24 34 71 50 " (in twin position). 



" 13 -24 34 71 46 fair. 



Calculated —24 26 71 52 



G, —13 (T31). Seen but once as a large, distinct, lustrous face with 

 good reflection (Figure 7). 



cp p 



Crystal 12 -20° 49' 74° 19' good. 



Calculated —20 45 74 21 



Y, —21 (2~11). On two crystals, small, not lustrous, and with poor 

 reflections, but certainly a face (Figures 6 and 7). 



