PHASE-CONTRAST MICROSCOPY 



91 



Q 





'%^ 







> v 



^ 





'^IK^'^ 











.rv*;: 



!SP***., _^,/ 



Fig. 2.25. Rat Carcinoma — Bright contrast-medium (courtesy of Dr. O. Gey, American 



Optical company). 



problems as the sequence of phenomena is readily observable. The 

 same applies to investigation of impurities in oil emulsions. Much 

 information regarding the structure of textile fibres is also gained by 

 means of this method which readily discloses minute inclusions, cracks 

 and the like. Rayon fibres and their cross-sections are conveniently 



