PULSE-RATE. 443 



a return at the end of 24 minutes to a rate not differing greatly from 

 that at the end of the first minute. The exact location of the lowest 

 point of the depression which occurs between the first and sixth 

 minutes is not evident from the data in the table as no records were 

 taken on this day between these two points. Some indication of this 

 may be seen from figures 95, 96, and 97, in which a curve has been 

 inserted between the curves of the two transitional pulse records, 

 which shows the relation of the pulse-rates at the sixth, twelfth, and 

 twenty-fourth minutes. It is seen that in the majority of cases the 

 pulse-rate is lower at the sixth minute than it was at the end of the 

 transitional period. 



The pulse-rates for Squad B on January 28 are given in table 99. 

 On this date an attempt was made to enlarge the pulse data by securing 

 more than one record or observation for the sitting and standing pulse 

 and to obtain records both with the subject standing in an adjoining 

 room as well as standing on the treadmill. The sitting pulse recorded 

 at the start is the average of 2 observations for How, Ham, and Van; 

 3 for Fis, Sne, and Tho; 4 for Kim; and 5 for Liv. For the period of 

 standing outside the chamber there was 1 observation each for Har, 

 Lon, and Sch; 2 for Tho; 3 for Fis, How, Ham, Sne, and Van; and 4 for 

 Kim. In the observations taken with the subject standing on the 

 treadmill Ham, Sch, Liv, and Wil each have 1, Sne 2, Van 3, Fis 4, 

 and Kim 5. 



As described in the section on technique (see p. 130), the pulse 

 records were also increased on this date over those of January 6 by 

 making, with the aid of a stop-watch, a visual count of 20 deflections 

 of the shadow of the string of the galvanometer across the face of the 

 camera at the end of each minute of walking. Since the pulse was 

 photographed for the transition from standing to walking, which 

 continued through the first minute, no photograph was taken for the 

 record after 1 minute of walking, as was done on January 6, but instead 

 a visual count was made. 



The figures given for the sixth, twelfth, and twenty-fourth minutes 

 were counted from the photographs, while the other pulse-rates 

 were counted visually from the deflections of the galvanometer string. 

 Failures to secure records for Lon and Tho for the walking periods 

 were due to illegible records on account of defective grounding of the 

 subjects. Other missing records are due to various causes. It has been 

 necessary, therefore, to take for the averages such data as were available. 



All of the subjects had a low pulse-rate, regardless of whether they 

 were sitting, standing, or walking. The average for the sitting pulse 

 for the 7 subjects whose records are available is 46 beats, the figures 

 for the individual subjects all being lower than those for the sitting 

 pulse taken the evening previous and given in table 87. After sitting 

 for 10 minutes the subjects stood and the records were taken as a rule 



