GENETIC TYPE AND THE EN I KK'lJl XF.S 



545 



Text-figure 91. (1) Characteristic record of the conditioned salivary reaction 

 to the signal in the animals of group A before the onset of inhibition. (2) 

 Absence of response in animals of group A to the first negative signal. Reading 

 from top to bottom, lines indicate: breathing; presentation of signal; presentation 

 of food; conditioned saliva; time in seconds. (3) Vigorous conditioned salivary 

 reaction obtained in animals of group B. The response is characterized by a 

 short latent period and vigorous secretion of saliva. (4) Response of the active 

 group B to the first negative signal. As a rule tins is as large as that given 

 to the positive signal. 



