GEXETIC TYPE AND THE EXDOCRIXKS 701 



animal was very restless in the intervals between stimulation. 

 The C-E was noticeably augmented, however, after the ad- 

 ministration of the parathormone and calcium lactate. The 

 animal was calm in the experiments. Restlessness or calm- 

 ness were registered in the interval between the first and 

 second stimuli in each experiment by the Fick work accumu- 

 lator, as in the case of animal 868. 



Comparative results of the training period and of the 

 period after partial thyroidectomy have already been dis- 

 cussed. 



It is apparent from table 17 that the percentage of correct 

 responses to the positive Met. 120 was further decreased on 

 the tetany days (82 per cent to 40 per cent) but after treat- 

 ment there was a noticeable increase toward the normal per- 

 centage (to 55 per cent). At the same time the percentage 

 of correct negative responses (to Met. 42) showed a steady 

 increase in each period (45 per cent to 67 per cent to 86 

 per cent). 



The effect upon the average magnitude of the C-E was 

 remarkable. The positive response fell at once during the 

 deficient period (23 to 8) but was revived to a slight extent 

 during the administration of the extract (10). 



In the first 5 minute interval between the positive and 

 negative stimuli in the experiments just before tetany and 

 before treatment, the dog moved about incessantly. She would 

 rise from the sitting posture and move from one side of the 

 platform to the other, moaning softly at almost every expira- 

 tion and pressing her head against the wall or against a por- 

 tion of the food box before her ; after this she would lie down 

 on the platform and rub her nose and forehead with the fore- 

 paws as though suffering from headache. After a short in- 

 terval she would spontaneously rise to her feet and repeat 

 the same behavior. In the period after treatment the rest- 

 lessness was superseded by calm. This result is shown quanti- 

 tatively in the table. On the tetany days the amount of 

 spontaneous interval movement (in mm) was high (142), 



