Refracted Rays of Light in Crystalline Media. 

 Fig. 5. 



267 



/ 



1 





\ 



\ 



/ 



1 



Z | 



1 



\ 



/ 



1 

 1 





1 







1 

 -J 



/^tv 



1 

 L__ 









1/ /*Vk 















X 





V\ Ji 











1 — V 













S*" 



N 









/ 



\ 









/ 



\ 









1 



Fig 



