214 



PHASE MICROSCOPY IN BIOLOGY AND MEDICINE 



fir-*. -^",::5v ^-"^s^ ^^-^'^^^^^^ 

 iMi,-:i**-.'. 'f-t.-.-^jrc: ■^■^.^m ',qrczr^f-'^i 



Fig. V.7. Kidney tissue in mounting media of different refractive index, 400 X. 

 Note reversal in 1.55 index fluid. (See text.) 



