208 Ganfield., Jlillehrand, mid Schaller — Mosesite. 



Slide with 

 kleiuite. 



First .. 



Second ... 



Temp. 



f 177° 

 ' 187° 

 194° 



j 177° 

 j 194° 



f 177° 

 1 194° 



Effect of heating Kleinite. 



Effect. 

 Doubly refracting, no change. 



Probably 



too thick. 



Doubly refracting, no change. 



Isotropic. 



Doubly refracting, no change. 



Partly isotropic, the remainder doubly re 

 fracting as before. The isotropic part 

 while still transparent had become brown, 

 the doubly refracting part remaining 

 pale yellow. 



It would be premature to speculate on the significance of 

 this observation on the optical behavior of kleinite. 



Third.... { 



