110 



ANN HAVEN MORGAN 



supported when being pricked and by putting the needle only 

 through the side surface it was thought that this was avoided. 

 Twelve frogs were stimulated by pricking and by water at 2°C. 

 Reaction to cold was ehminated by cocaine treatment in as short 

 a time as ten minutes. No effect upon the pain response or its 

 reaction could be discerned. 



TABLE 20 



Responses in seconds of the foot to pain and cold. Right foot cocained 10 to 30 



minutes. Left foot normal. Reaction allowance, SO seconds. 



Stimulation time, 2 minutes, co = no response 



