DISCUSSION OF RESULTS. 



139 



5 h 30 m p. m., one may assume that the activity was essentially of the 

 grade I, i. e., minimum. Nevertheless the pulse-rate is considerably 

 higher in the period between 4 p. m. and 4 h 30 m p. m. than in the two 

 following periods, as is shown by the pulse curve and the figures for 

 the pulse-rate per minute. As a matter of fact, the total metabolism 

 is likewise higher in the first period as is evidenced by the carbon- 

 dioxide output per hour which is given on the pulse curve. In this 

 curve, therefore, which excludes the extraneous activity, we find the 

 pulse-rate following very closely the total metabolism. While the 

 kymograph curve did not indicate muscular activity, nevertheless the 

 pulse-rate gave evidence of an increased internal activity. 



A comparison of the records obtained for the muscular activity, the 

 pulse-rate, and the metabolism in the observation with A. D. on May 

 19, 1913, gives further evidence on this important point (see figure 50). 

 In the two periods from 3 h 35 m p. m. to 4 p. m. and from 4 h 31 m p. m. 

 to 4 h 54 ra p. m., the muscular activity shown by the kymograph records 

 would be classified as I. The pulse-rate in the first of these periods 

 (period II) was 113 and in the second (period IV) 104. This variation 

 in the pulse-rate is accompanied by a like variation in the carbon- 

 dioxide production, which was 3.02 grams per hour in period II, and 

 2.66 grams per hour in period IV. Here again the pulse-rate is seen 

 to be a closer index of the total katabolism than is the kymograph record. 



PERIOD - II 

 C0 2 per hr 3.02 gn 



PERIOD- IV 



, ,,.„ .. H" »»' 



■» " ,< H -r-|- 



T~*~ 



««|J 



p^^-— #VW.l r~ 



AD. 

 MAY 19.1913 



Fig. 50. Pulse-rate and kymograph curves for A. D., May 19, 1913. 



Two selected periods which were obtained with the infant J. M. in 

 the observation of April 4, 1913, are compared in figure 51. These 

 periods, both of which had an activity of I, also show the pulse-rate 

 and the carbon dioxide output in harmony, the pulse-rate in period I 

 being 112 as compared with 97 in period VI, with a carbon-dioxide 

 production of 7.08 grams per hour and 6.41 grams per hour respectively. 



40S, 

 3 40 



