PULSE-RATE. 441 



walking; and finally a few wrist counts during the 10 minutes following 

 walking. The difficulties in this program lay in the overlapping of the 

 experiments, due to unavoidable delays at one point or another in 

 the routine, to an occasional poor contact of the body electrodes, or 

 to a defective grounding of the subject. These difficulties made it 

 impossible to get a complete record in every instance; those obtained 

 are given in tables 98, 99, and 100. The pulse-rates at the sixth, 

 twelfth, and twenty-fourth minutes of walking are also shown for 

 January 28 and February 3 in figures 95 to 100. 



If an attempt is made to use only averages which include a complete 

 series for each man, we find that there are too few for a satisfactory 

 comparison; the average pulse-rates per minute for each squad are 

 therefore for such records as are available in each series of observa- 

 tions. The comparisons are made from these averages, which in some 

 cases consist of the entire squad of 12 subjects, while in others a smaller 

 number are included. 



Table 98 gives the records of January 6 with Squad B, normal. If 

 the sitting pulse records are compared with those taken the evening 

 previous in connection with the series of psychological tests (see p. 403), 

 we find in the main an agreement that is as close as could be expected 

 with conditions so different. But the pulse-rates of Sch and Sne 

 (92 and 97) are so high and so much higher than the other sitting 

 records that it indicates the presence of an unusual stimulus. This is 

 the more apparent when the standing pulse is considered, for whereas 

 all the other subjects show an increase, these two men show a drop of 

 24 and 28 beats, respectively. The average sitting pulse for the group 

 is therefore taken as 72 beats and does not include these two high 

 pulse-rates of Sch and Sne. 



The records of the standing pulse were taken after the subjects had 

 been standing 10 minutes. In a few cases on this date the subjects 

 stood on the treadmill, while others stood in an adjoining room. The 

 average standing pulse includes both locations, and for the 11 subjects 

 is 79 beats, which is an increase over the average sitting pulse for 8 

 subjects of 10.0 per cent. 



An inspection of this table shows that in most cases by the end of 

 one minute of walking, the pulse-rate increased over that for standing, 

 but that the rate for Fis, Ham, and Liv was slightly lower. The 

 average for the 12 men is 88. This is an increase of 22 per cent over 

 the average sitting pulse-rate and of 11 per cent over the average 

 standing rate. By the end of 6 minutes of walking the pulse-rate 

 shows in 8 cases a decrease from the rate after one minute of walking, 

 ranging from a maximum of 8 beats for Har and Wil to 2 beats for 

 Sne and Tho; of the remaining 4 subjects, Liv's pulse increased 3 beats 

 and Kim's and Ham's 1 beat each; McM's pulse showed no change; 

 the average is 85 beats or an increase of 8 per cent over the standing 



