550 



W. T. JAMES 



Text-figure 93. (1) Eecord showing the inertness among the dogs of group A 

 after the period of training in the conditioned food taking situation. There 

 is hardly any noticeable reaction to a bell introduced for the first time in the 

 middle of an experimental period. (2) Eecord showing the alert arid active 

 nature maintained by the animals in group B in the conditioned food taking 

 situation. There is a sudden orientation to a bell introduced for the first time 

 in the middle of an experimental period. (3) A further example of the reactions 

 of group B to the conditioning signal. Note the variable head movements, a 

 short latent period of the conditioned reaction, and the great magnitude of the 

 conditioned saliva. 



