ART. 21 MIARGTRITE SILVER ORE FROM CALIFORNIA — SHANNON 

 Measuremenls of miargyrile crystal, Figure 3 — Continued 



Form Symbol 



No. 



10 



11 



12 



13 

 14 

 15 



Letter! Gdt. 



New? 



New? 



New? 



New? 

 B 

 k 



16 ■ k 



17 I 

 18 



+ 3I 



+ q1 



+ 3I 



+ 0I 



+ 15. 1 



+ 11 



+ 42 



Miller 



+ 



11 



42 



21 

 33 



21 

 33 



733 



733 



433 



433 



15.1.1 



124 



124 



213 



213 



Qualit}' description 



Excellent. 

 Good 



Excellent. 



do 



Poor, rounded. 

 Good 



.do. 



Medium. 



Poor, mult. 



Measured 



37 53 

 39 25 

 24 45 



Calculated 



75 16 j 40 02 



I 



75 15 



74 38 t 40 02 I 75 15 



72 15 



24 59 I 72 15 26 41 72 56 



26 41 



72 56 



78 18 

 19 30 



86 00 1 78 57 86 14 

 56 34 15 19 56 27 



18 07 57 05 



28 44 I 47 34 



25 16 I 47 34 



15 19 56 27 



27 25 ! 47 32 



27 25 I 47 32 



Of the faces measured on this crystal three forms, represented by 

 two faces each, are apparently new, although the quality of the faces 

 is such that it can not be positively asserted the indices derived for 

 these are correct. They are: 



No. 8 ¥'=48 09 



No. 9 50 18 



Average 49 14 



722 calculated 50 59 



Difference A= 1 45 



No. 10 <p=37 53 



No. 11 39 25 



Average 38 39 



733 calculated 40 02 



Difference A= 1 23 



No. 12 v'=24 45 



No. 13 24 59 



Average 24 62 



433 calculated 26 41 



Difference A= 1 49 



