GENETIC TYPE AND THE ENDOCRINES 727 



to zero in a much shorter time than on the preceding day 

 (in 39 minutes instead of 5 hours and 19 minutes after the 

 injection). The dog showed the first signs of restlessness 27 

 minutes after the adrenalin. 



On the third day the responses, both before and after the 

 injection, were exceedingly low in value. As on the preceding 

 day, the value did not increase above the maximal reading 

 before the adrenalin (7). There were, however, more correct 

 responses after the injection than before (5 out of 6 against 

 3 out of 6). The reaction was zero within 36 minutes after 

 the adrenalin. 



The motor C-E was quite normal when tests were made 

 10 days after the experiment. 



The behavior of the dog in the kennel was not observably 

 affected during these experiments. 



Dog C-l 9 , bassethound X slieplierd F s . The aim of this 

 experiment was to test the effect of adrenalin upon the salivary 

 C-R in a normal dog. The negative differential stimulus 

 was not used. 



In dog C-l adrenalin was administered continuously during 

 three separate periods, the dose being increased in strength 

 at each period. Throughout each experiment the injections 

 were made subcutaneously, 1 hour before the behavior tests 

 were begun. In the first period, adrenalin, 1 cc. of a 1 :50,000 

 solution, was given daily for 5 days. After a lapse of 16 

 days the second period was begun, in which adrenalin, 1 cc. 

 of a 1 :25,000 solution, was given daily for 4 days. After a 

 lapse of 39 days the third period was begun, with adrenalin, 

 1 cc. of a 1:1000 solution, given daily for 3 days. 



Behavior was quite appreciably affected in each period. 

 In the first and second periods the C-R showed an initial 

 increase followed by a decrease; in the third it showed a 

 decrease. The average magnitude of the C-R was increased 

 slightly during the mild dosage and very noticeably during 

 the stronger dosage, but when the dosage was very strong, 

 the value, instead of showing a further increase, declined 

 far below normal. 



