PALACHE. — CRYSTALLOGRAPHY OK LEADHILLITE. 457 



r, OJ (034). On three crystals as narrow faces with poor reflections 

 but in good position. Also observed on Utah material. 



A, 03 (031). Seen on two crystals with three faces, two of them 

 large and distinct, giving good reflections, in excellent agreement with 

 calculated position. Since it was also observed once on Utah crystals, 

 the form is well established. 



C, fO (403). This dome was seen but once as a distinct though 

 narrow face in the orthodome zone. Although the reflection was poor, 

 it is in good position and the form is regarded as established. 



I, If (252). Observed but once as a distinct face in an important 

 zone in excellent position. 



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Crystal 11 24° 49' 71° 55' fair. 

 Calculated 24 44 71 54 



K, 13 (131). Observed twice on one crystal and once on a second 

 with excellent faces. It is in the same zone with the foregoing and in 

 excellent position. 



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Crystal 10 21° 00' 74° 24' good. 



10 20 59 74 26 



11 20 58 74 25 

 Calculated 21 00 74 22 



S, T4 (T41). Observed on two crystals as a narrow line face in an 

 important zone and on a third as a larger face with excellent reflection 

 in good position. 



