PLATE 3 



EXPLANATION OF FIGURES 



6 Photomicrograph from a cross section of a human sciatic nerve. Pal- 

 Weigert method, b, large medullated fibers; c, small medullated fibers. X 600. 



7 Photomicrograph from a cross section of a human sciatic nerve. Cajal's 

 method, a, non-medulated fibers; 6, large medullated fiber; C, small medul- 

 lated fiber. X 600. 



SO 



