557 



^IPIR^ 



♦ 



Plate II — A: Oscillograph display of the spectral dependence of Euglena bifluo- 

 rescence when the chloroplast is viewed in profile; B: The same as II A 

 except the chloroplast is viewed in the facial aspect; C: Depolarization of 

 fluorescence (720 m/i) see text; D: Mesophase of poly-benzyl-L-glutamate 

 in dioxan (after Robinson, 1961); E and F: Dichroism of sickled erythro- 

 cytes (Hb-C Georgetown) 43 5 m/i. 



