488 University Geological Survey of Kansas. 
62 represents a twinned crystal. Measurements with the 
contact goniometer are as follows: 
CRYSTAL. Angle. measure- Average. Calculated. 
1. | K:,K:¥ | 2131 ,3121 1 36° 20' 35° 36’ 
lL. |e-ag- | 02212201 | 8 54 10 53 46 
1. 1S: Ae. 012), 02251 1 38 30. 36 52 
lL. | t:at:y 9134 8124 1 TO B10 20 364 
No.2, |itsnts || 21384 ,2304) | 90 42 0 41 55 
OVS Ae OLA A022) 9 1 37 «0 36 52 
0. | K:,K:v |] 2131,3121 1 36 30 35 86 
Ate AAs CRS ap las s yoy lis S (on Ales). 
Small to medium-sized crystals of deep amber color, from 
Jasper county, exact locality not given. Figure 63. K: is 
the dominant form. v-, ordinarily subordinate, sometimes 
becomes very prominent. The faces and the edges are much 
rounded. Crystals of the type studied were two medium- 
sized ones and a group of small ones in the Egleston Miner- 
alogical Museum of Columbia University, New York city. 
g- was recognized by the fact that it truncates the acute polar 
edges of K:. Measurements with the contact goniometer 
are as follows: 
Angle. ea Average. Calculated. 
ments. 
V: AV: 0554/5054 6 84° 35’ 84° 321’ 
v- Av(cleavage)| 0554,0111 6 96 30 96 34 
K:,K2 9131,2311 1 75 30 15 22 
Keer 2131-3121 | 1 | 36 30 | 85 36 
