226 



INDUSTRIAL APPLICATIONS OF PHASE MICROSCOPY 



0.2A-X/4 



Fig. VI.2. Microgranite, 75 X. A, bright-field. B, polarization. C, bright- 

 contrast phase. D, bright-contrast phase plus polarization. E, dark-contrast (A — ) 

 phase. F, dark-contrast phase plus polarization. 



