Noguchi 



Plate 24 



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A. Medulla oblongata of Rana catesbiana (4 hours in physiol. salt sol.). X 500. 

 ,B. The same, kept 2 hours in Cobra venom solution. X 500. 

 C. The same, kept 4 hours in Moccasin venom solution. X 500. 



_ ,_ ,_ ,_ ,_ ,_ ,_ ,_ ,_ ,_ ,_ ,_ (Photomicrographs.) 



