Contrast by Scattering 



53 



Fig. 15c. Extremely thin fibers of a synthetic rubber "Koroseal," 

 photographed with R.C.A. electron microscope. Magnification about 100,- 

 000. Defocused photograph, showing Fresnel fringes. The dark centers are 

 presumably phase contrast images of the giant molecules. (By courtesy 

 of B. F. Goodrich Co. and Dr. V. K. Zzvorykin, Associate Director of 

 R.C.A.) 



