EFFECT OF DELAYED FEEDING UPON LEARNING 



55 



box. Often considerable pressure had to be exerted upon the 

 rod to keep the lid on. Their acts were very rapid too rapid 

 for the recording of accurate notes. Under such conditions 

 thirty seconds is a long time and a great tax upon the experi- 

 menter. There is a strong tendency on his part to let the ani- 



2 46 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 <0 



mals have the food a bit too early. For this reason the experi- 

 mental technique here is not ideal and automatic control for all 

 the variable factors should have been introduced. 



Notwithstanding this weakness in technique some interesting 

 light is thrown upon this general problem. Below I give sepa- 



