GENETIC TYPE AND THE ENDOCRINES 



565 



sistance to the training-, and the laboratory and experimental 

 procedure do not prove so disturbing. 



Five dogs fall into this group, including the following: 

 two bassethound-German shepherd F 2 s, 1152 5 and 1528 9 ; 

 one bassethound-English bulldog F u 579 9 ; one bassethound- 

 German shepherd Fj, 308 6 ; one backcrossed bassethound- 

 German shepherd Fj on bassethound, 710 9 . 



The behavioral charts of 308 6 and 1152 6 (text-figs. 98 and 

 99) are typical of the group. As the chart for 308 $ shows, 

 these dogs are capable of giving a positive salivary reaction 

 to varied stimuli, without leading to a disturbance or the 



VALUE of OEUV 



■nii.iiyULrti.Mil.ll.ill 



Text-figure 98 



inhibition of the reaction. This dog formed positive reactions 

 to a clicking sound of 120 vibrations per minute, a constant 

 light, tactile stimulation of the right shoulder, odor of vanilla, 

 a whistle, and a buzzer. Negative reactions were formed to 

 a clicking sound of seventy-two vibrations per minute and 

 intermittent light, and tactile stimulation of the right hip. 

 The dog differs from those of A-plus in that the positive 

 response to the signals retains its value, and in some cases 

 increases slightly in value, as the experiments progress. 

 Another characteristic is the instability of the negative re- 



