1909.] 



Electrical State of Living Tissues. 



309 



first and subsequently diminished, disappearing at a box temperature of 

 between 45° and 50°. The normal (ingoing) current at first increased and 

 subsequently diminished. 



With falling temperature the electrical response diminished progressively, 

 being altogether abolished at a box temperature of between —4° and —5°. 

 The normal ingoing current diminished progressively with the fall of 

 temperature. At the box temperature of 4° to 5° a sudden diminution of 

 the ingoing current {i.e. an outgoing effect) was sometimes witnessed, which 

 I attributed to an excitation occurring at the point of congelation. But in 

 other cases mere irregular deflections were seen at this point. 



Thus, as may be seen from the accompanying plotted curves, the effect of 

 heat and of cold was in the same (outgoing) direction ; the increased ingoing 

 effect at the first application of heat being no greater than the spontaneous 

 increase that takes place without alteration of temperature.] 



Effect of gradual rise of temperature upon the normal Effect of gradual fall of temperature upon the 

 skin current. Upper line = E.M.F. readings by normal skin current. Upper line = E.M.F. 

 compensator ; lower line = tempei*ature curve. readings by compensator ; lower line = tem- 



perature curve. 



