Smithsonian Report. 1960 -Dillon 



Plate 4 



ANALYZER AXIS 



POLARIZER AXIS 



.01 INCH 



•••. B 



"^b. 



°°o R 





^^^. 



^^. 



=^0^ 109.5' 



X 70.6° I,.---' ^ 



\^i 70.6° /^^f, 



\| 109.5V^ 



'-'OOOOOOOOO Qp 



i 70.5^ 



r .' O 



W 



V "2 'fr 



.«>" 



.cf° B 





-,o" \ 



e>^ 



.rf' 



,cP' 



Domain sliuclurc in a thin section of yttrium iron garnet, the crystal plane of which is 

 perpendicular to the face diagonal. (See figure 6.) The contrast between the domains 

 whose magnetization is parallel and not parallel to one of the polarizer analyzer axes 

 arises from the magnetic birefringence. 



