Temperature upon Electrotonic Currents. 



391 



clearly that such standard deflection gives measure not only of the 

 electrical resistance, but also due reservation being made of the 

 effect of drying in the course of a prolonged observation at raised 

 temperature is itself available in measure of the alteration of tem- 

 perature of the nerve. 



Exp. 2344. Deflections by a small constant E.M.F. (O002 volt) 

 through a .Nerve at rising and falling Temperature and through 

 two Galvanometers. 



40" 

 35 

 J0 



/ncremente of GemperaCurs 



- increments of o'ef/ecC/on read upon G f . 



n > " measured from the record of G 2 . 





G, 



50 



JO 15 20 25 JO 65 4O 



50 55 60 mm. 



[Experiments on the comparative effects of acids and bases upon 

 the A and K currents, have shown that within a certain moderate 

 range of concentration (soakage of the nerve in n/15 to nj^O solution 

 for one minute) acid favours the K current and disfavours the A 



