RESPIRATION RATE. 477 



18 to 24 at the end of 1 and 6 minutes, respectively, while with Sne 

 the prewalking respiration rate of 25 fell immediately after the begin- 

 ning of walking to 22 and continued at 23 for the remainder of the test, 

 a condition exactly opposite that reported with Sch. While the data are 

 too few for generalization as to the change from the standing position 

 to walking, the successive records obtained during walking are fairly 

 numerous and show that there was no tendency for the respiration rate 

 either to decrease or to increase as the test proceeded, although there 

 were slight variations. On January 6 the respiration rate with the 

 subject standing after walking was not obtained for any of the men. 



Squad B was at this time on normal diet ; hence the only conclusion 

 that can be drawn is that the respiratory rate of the subjects inside the 

 respiration chamber is practically unaltered by walking during the short 

 period of 24 minutes, and that the carbon-dioxide increment inside 

 the chamber had no measurable effect upon the respiration rate. This 

 is perhaps the most important point to be noted from this particular 

 test and indicates again that this squad is a true control for the subse- 

 quent test made with Squad A, as well as the test with Squad B after 

 the rrien had been put on low diet. Thus it may be fairly assumed 

 that an increment in carbon dioxide may be ruled out as a factor 

 affecting respiration rate — at least the percentage of carbon dioxide 

 with which we deal here. 



On January 28 a second series of walking tests was made with Squad 

 B at the Laboratory during which the respiration rate was counted. 

 An examination of the data given in table 110 shows that here again 

 we were particularly unfortunate in not securing a large number of 

 counts before and after walking. Even a larger number of these 

 records were illegible than in the first test and can not be recorded 

 with any degree of accuracy. The 2 subjects with whom prewalking 

 values were obtained showed an increment due to walking. Of par- 

 ticular significance is the apparent increment in the case of Sne, who 

 went from 18 counts to 26 during the first minute of walking. After 

 the first minute the rate rose to 29 per minute. The prewalking value 

 of 18 was based upon a count of only three respiratory cycles and is 

 thus somewhat uncertain. Consequently the evidence is by no means 

 clear from these data that under these conditions walking results 

 in an increased respiration rate. With five of our subjects we have 

 records for standing after walking. In all five cases we find a material 

 drop in respiration rate following the last record obtained for the 

 walking. This fall is as much as 7 respirations in the case of Fis and 

 with the other men ranges from 1 to 6. 



From the beginning to the end of walking there is an increase with 

 Fis of 5 respirations; with Ham 6; and with Kim 1. With all other 

 subjects except Sne, the records are incomplete, but the evidence points 

 to a tendency for a slight increase in the respiration rate as the walking 



