I Tem 



Q 



pera 



a ture 



© 



01 



o 























1 m 



















\ 5 



















i iy 



\ 

















< 



















< 



• \ % 



* v 



















V 



\ 



V 



\ 

 \ 

















< \ 



\ 



^abrade 



B 





































> 



S3 



.5 



0) 



-3 



















\ 



\ 

 1 



















\ 



» S3 



» DC 



\ i 











Fig. 2 . Curves showing 

 relation between 



Specific Gravity of Crystal 



and the melting-paints of 



A - Crystal, B - Glass. 





A 



\H 

















\ 

 1 



1 

 t 

 1 





























\feg 



\ ^5 















x 



\ 







■* 



J 



j 











\ 



3 







