Noguchi 



¥ ■ 



Plate 25 





•>s 





^•^ # 



agjSS'-.v*-. 



^^r-- 







'(T * V 



.iSS- - 



^I *"!* ' .' ' 



y '-^ 





\ 



\ 



^ 



V 



D 



B 



% 



Nerve Fibers of Rana catesbiana. 



A. Normal (low power). B. Normal (high power). 



C. Acted on by Cobra venom for 2 hours (low power). D. Acted on by Cobra 



venom for 2 hours (high power). 



(Photomicrographs.) 



