Minerals of the Composition MgSi0 3 

 17 



425 



16000 

 (1535 a ) 1 

































































































































































































































s 



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is 





































i/ 



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t 



























15000 













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O 

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2 











f 

































S 14000 









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-1-9 









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g 











































H 







1 













































i 



















































































1 





































13000 















































1 





















































































! 













































1 

















































































































































































































1 







































12000 





1 







































(1230°) 



\\ 







































Fig. 17. 



Time— 1 division = 1 minute. 



I = Enstatite. 

 II = Monoclinic pja'oxene. 



