On Skin Currents. 



483 









'//oo 

 VoU 



B5,000 



B 5,000 















t 



1 



Bipoo io ao so min. 



A B 



A, outgoing response to outgoing excitation (outer surface kathodic) ; B, outgoing 

 response to ingoing excitation (outer surface anodic). The outgoing response, 

 B, is preceded by a brief ingoing effect, homodrome with the exciting current. 

 The excitation is by single break induction currents, 1000 + , 1000 — , 5000 + , 

 5000 -. 



10 20 minsZO 



PI 



Polyphasic effect of direct excitation. Out — in — out. Eesponse of this type is 

 infrequent. The usual effect (or after-effect) is a strong or predominant 

 outgoing effect, as shown in preceding figure. 



Influence of Eaised Temperature upon Direct 

 Response of Frog's Skin. 



Time. 



Temp. 



Tetan. 1000 +■ . 



Tetan. 1000 - . 



mins. 



20° 



+ -0200 



+ '0230 



40 „ 



30° 



+ -0260 



+ "0230 



50 „ 



40° 



+ -0020 



+ -0005 



55 „ 



45° 



+ trace 



— trace 



• 



