EXPERIMENTS WITH SUBJECT STANDING. 



109 



first period of February 1 is likewise the average of three counts of 

 from 44 to 61 seconds, giving pulse-rates of 95, 93, and 99. These 

 high figures and the high average for this day and for the day 

 preceding may find some explanation in the fact that E. D. B. had not 

 acted as subject for three weeks prior to January 31, owing to lameness 

 (see p. 42). Accordingly an element of excitement may have been 

 introduced by the fact that he was resuming the experiments. Fur- 

 thermore, a note in the protocol for January 31 says "slight cold and 

 hoarseness," and on February 1 the note is made that the "subject 

 eeemed to have a slight cold in the throat." It is possible, therefore, 

 that the pulse-rate for these two days should not be included in the 

 daily averages, although this has been done in computing the general 

 average of 78 for this subject. If these are excluded, the average 

 standing pulse-rate for E. D. B. is 77, a difference which is negligible. 

 The few pulse-rates obtained with the laboratory assistants and 

 recorded in table 7 (p. 55) give but little idea of the true pulse-rate 

 during standing, as they are apparently influenced by other factors. 

 The records for J. H. G. show a daily pulse-rate varying from 117 

 to 106. He found standing very irksome on January 18 and reported 

 that his knees were "shaky" at the close of the standing experiment. 

 He made no such comment on the other days. The pulse-rate of 

 E. L. F. on January 21 showed a rapid increase during the first period 

 as the experiment continued, rising from 87 after one minute of stand- 

 ing to 95 and 108 at intervals of 5 and 4 minutes, respectively. The 

 other two standing periods on this date showed some increase, but 

 not so large as this. On January 24 the statement is made in the 

 protocols: "Subject all tired out at end of third period; complained of 

 headache." He was apparently not in the best of physical condition 

 on this day, but continued with the morning routine, three walking 

 periods following the standing periods. H. M. S. on January 25 

 "found standing tiresome" and "was glad to start walking." The 

 records for each period are unusually uniform. As evidence that the 

 variations met with in the course of this study are due to the personal 

 element and not to the technique, the records of H. M. S. are given in 

 detail in table 25. It may be said that the age of this subject and his 



TABLE 25. Detailed pulse-rate records for H. M. S., standing. 



