Eespiration Kate. 321 



whole, then, there was a marked tendency for the respiration rate to increase 

 as the experiment continued. The usual rate during the preliminary night 

 of experiment No. 80 was 14 per minute rising somewhat (17) in the fore- 

 noon of the next day. In the afternoon the respiration was irregular (12 

 to 20) and during the night of October 27-28 it was noticeably higher than 

 during the preceding night. 



On the second day of the experiment the rate was slightly higher than on 

 the first day, while on the last night the rate was practically the same as during 

 the preceding night. The respiration rate therefore showed a distinct tendency 

 to increase as the fast progressed. 



In experiment No. 81 the respiration rate during the preliminary night 

 was about 13. On awaking it increased to 17, but did not materially quicken 

 during the day. While the subject was asleep during the day the rate was 

 even less than that of the night. On the second night in the chamber (first 

 night of the experiment proper) the rate was about 14 per minute. It was 

 perceptibly higher on the whole throughout the second day and higher also 

 during the last night. Here also there was a tendency for the rate to increase 

 as the experiment progressed. 



The respiration rate on the first preliminary night of experiment No. 83 was 

 17 per minute. During the day it increased to an average of about 20, falling 

 off in the evening and remaining at about 16 to 19 during the night. On the 

 second day of the experiment proper the average respiration rate was about 20, 

 falling off somewhat during the evening, although rising again during the last 

 2 hours of the experiment to 20. There was therefore a slight tendency for the 

 respiration rate to increase on the second day of the experiment, and there 

 was a noticeable rise in the morning just before awaking. 



In experiment No. 85 the respiration rate during the last part of the first 

 night averaged 12. It remained about the same during the next day, but 

 increased slightly in the latter part of the afternoon. During the entire 

 remainder of the experiment the respiration rate remained singularly constant 

 and the differences usually observed between night and day almost disappeared. 



In experiment No. 89 the rate during the preliminary night was 16. During 

 the following day it rose to 19, falling off in the evening to 16. During the 

 second day the rate was unusually low for this subject during the forenoon, 

 but rose to 21 at 2 o'clock, and during the 2 hours, from 6 h 30 m p. m. to 8 h 30 m 

 p. m., remained at about 21 or 22. During the last night the rate remained 

 practically uniform at 16 per minute. 



While recorded with considerable frequency and hence of great value as 

 supplementing the data furnished by the pulse rate for estimating the amount 

 of internal muscular work, nevertheless the respiration rate was not studied 

 with sufficient accuracy to enable special conclusions to be drawn from it. 



21 



