DISCUSSION OF RESULTS. 



Observation with M. M., June 5, 1913. 



135 



The kymograph curve for the infant M. M., obtained in the observation 

 on June 5, 1913, has certain striking points, inasmuch as the minimum and 

 maximum activity are very well shown (see figure 47). During the prelimi- 



-jNmr* 



MM 

 JUNE5.I9I3 



Fig. 47. Kymograph curve for M. M., June 5, 1913. 



nary period from 3 h 12 m p. m. to 3 h 40 m p. m., the infant was somewhat 

 restless, quieting down sufficiently about 3 h 35 m p. m. to justify the beginning 

 of a new period at 3 h 40 m p. m. As a matter of fact, the infant was so quiet 

 in the next period that the activity can be characterized as I (see table 28). 



Table 28. — Comparison of the pulse-rate, metabolism, and muscular activity in observation 



with M. M., June 6, 1913. 



•Preliminary period. 



The activity in the last period, i. e., that from 4 h 58 m p. m. to 5 h 23 m p. m., 

 was sufficiently great to be classified as VI. This curve shows clearly the 

 futility of attempting to graduate by kymograph records the exact degree of 

 the activity and the heat-production, for although the curve appears to indi- 

 cate that the activity in the last period (from 4 h 58 m p. m. to 5 h 23 m p. m.) 

 was much greater than that in the preliminary period from 3 h 12 m p. m. to 

 3 h 40 m p. m., the metabolism is very nearly the same and the pulse-rate is 

 only 6 beats higher in the last period. This also justifies the statement 

 previously made that the measurements obtained in preliminary periods are 

 not sufficiently reliable to admit of extended discussion. The fact that no 

 greater metabolism is shown in the last period than in the preliminary period, 

 although the activity appears to be greater, should therefore be considered 

 as a deduction based upon single measurements in two individual periods, 

 either of which may be liable to error. Furthermore, when comparing the 

 pulse-rates it should be stated that although the average pulse-rate in the 

 preliminary period was 107, the individual counts ranged from 95 to 120, 

 while the pulse-rates in the last period, although the average was 113, actually 

 varied from 93 to 124. Discrepancies such as these serve again to emphasize 



