WHITLOCK. — CRYSTAL FORMS OF CALCITE. 351 



Melczer 158 on crystals from Budapest. Both the Miller indices and 

 the good zonal relations of this form should class it as well established. 

 3 (1 * 13-14- 1) = (16-13-26). This scalenohedron was observed 

 by Sansoni 159 on crystals from Freiberg. In spite of the extreme 

 steepness of this form the zonal relations are fairly good ; the po]e of 

 (1-13- 14-1) marks _the intersection of the zones [1011 : 0110], [4221 : 

 3361] and [5161 : 4481]. The form should be classed as fairly probable. 



r (3 -15 -IS- 2) = (23-14-31). This scalenohedron was noted by 

 Whitlock 160 on crystals from two localities in the New York State, i. e., 

 Union Springs and Rondout. In spite of the steepness of this form 

 and the fact that the Miller indices corresponding to it are somewhat 

 irrational the zonal relations are fair. The pole of the form falls_at 

 the intersection of the zones [5491 : 2791], [3142 : 0110] and [4041 : 

 3361]. Like the preceding, this form should be classed as fairly 

 probable. 



£ (6- 13-19- 4) = (29-11-28). This scalenohedron was observed" 

 by Whitlock 161 on crystals from Kelley's Island, Ohio. This form,, 

 which was observed on both types from this locality, was identified 

 from a good series of measurements taken from smooth and well 

 developed planes. The form lies in the zone [8- 8-16-3 : 8- 16-8 -3] 

 a relation which was checked by observation, and also marks the inter- 

 section of the zones [3302 : 0110] and [0-13-13-4 : 10l0]. The form 

 may be regarded as probable. 



h 5 (6-13-19-8) = (11 -5 -S). This scalenohedron was observed by 

 Flink 162 on crystals from Uto, Sweden. The combination as drawn 

 by Flink shows the planes of this form lying in zone with those of 

 (5-12-17-8), that is in zone [5 • 12 • 17 • 8 : o • 17 • 12 • 8] a relation which 

 is proved up true when tested by zonal equations. Moreover the pole 

 of (6-13-19-8) lies close to the intersection of Z 6 Zg which intersec- 

 tion is marked by the pole (2573). The form appears to be somewhat 

 doubtful. 



h 6 (5-12-17-8) = (10-3-7). This scalenohedron was observed by 

 Flink 162 on the same combination as the preceding. The same 

 objection to the form as drawn as that given under (6-13-19-8) applies. 



158 Melczer, G., Fold. Kozlonv, 26, 79 (1896). 



159 Sansoni, F., Giorn. Min., J. 72 (1894). 



160 Whitlock, H. P., N. Y. State Mus. Mem., 13, Plate XVIII, Fig. 7 and 

 Plate XXVI, Fig. 1 (1910). 



161 Whitlock, H. P., S. of M. Quarterly, 31, 231 (1910). 



162 Flink, Arkiv. f. Kemi. Min. Geol., 31, 174 (1910). 



