SCHALLER 



calc. for 1 1.6.7. 13} 

 meas. (1) 

 (2) 

 (3) 



7° 35' 

 7 67 

 7 04 

 7 01 



p = 26° 27' 

 = 26 34 

 = 26 24 

 = 26 24 



The form is considered as well established. It is shown in fig. 4 

 which illustrates the ideal combination found on the crystal measured. 



4. CALCITE FROM NEW MEXICO 



These crystals were received from Mr. C. H. Gordon, the locality 

 being Macey's Mine, 2| miles east of Hillsboro, New Mexico. They 

 are in loose crystals, a centimeter thick and somewhat longer and 

 are associated with large endlichite crystals. The calcites often have 

 partially adhering white or pink gangue. Almost all the crystals, 

 usually doubly terminated, show only the prism w 1 1010 | and the 

 negative rhombohedron e {0112 | . The e faces are striated parallel 

 to their intersection with r while the prism faces are covered with 

 triangular markings or etch figures. These triangular markings 

 always point toward the e face, the base of the triangle being nearest 

 the r face. 



Two crystals showed considerable differences from the others 

 and were therefore measured with the results given below. Crystal 

 no. 1 is prismatic, 12 mm. long and 4 mm. thick, is colorless and trans- 

 parent. It is shown in fig. 5 which represents the crystal as it actually 

 is, excepting that the narrow scalenohedra in the zone r e are not 

 shown. The forms present on this crystal are: m { 1010 } , a 1 1120 | , 

 r|10]l|, M{4041|, w I 28.0.28.1 1 , e | 0112 j^ic; | 3145 } , G { 5279 } , 

 / 1 2134 \,v\ 2131 1 and the new form 1 1 3.10.13.3 \ . 



The following table shows the angular values : 



