74 



Metabolism of Healthy Man. 



whole of the day until 9 h 10 m p. m., when he was weighed again, and retired. 

 At 7 h 10 m a. m., May 18, the subject began a period of lying awake which 

 lasted until the end of the experiment at l h 10 m p. m. The results in their 

 application to the study of the work of digestion will be included in a later 

 publication. The periods of 6 hours each are given here for a comparison of 

 metabolism while lying asleep with that while lying awake. 



The portion of the experiment here reported extends from l h 10 m a. m. 

 until the end of the experiment at l h 10 m p. m., May 18, thus covering a period 

 from l h 10 m a. m. to 7 h 10 m a. m., when the subject was asleep in bed, and a 

 second period, 7 h 10 m a. m. to l h 10 m p. m., when he remained in bed but not 

 asleep. The subject slept well during the night but sat up in bed for a moment 

 at 2 h 30 m a. m. and awoke finally at 6 h 30 m a. m., although he was not supposed 



Table 39. Record of pulse and respiration Metabolism experiment No. 153. 



to be awake until 7 h 10 m a. m. He did not rise until called at 7 h 10 m a. m. 

 He then passed 291 grams of urine and at 7 h lG m a. m. he readjusted the rectal 

 thermometer. The subject lay quietly awake till l h 10 m p. m., when he passed 

 199 grams of urine. The report of the subject was that he slept most of the 

 night; that he was troubled with a slight backache, especially during the time 

 when he was lying awake ; and that he was not sleepy during the lying awake 

 period and did not sleep any. 



The pulse and respiration were taken by means of the pneumograph and 

 the records will be found in table 39. The rectal temperature was taken by 

 means of the electrical-resistance thermometer. Unfortunately, the thermom- 

 eter did not keep its adjustment during the night and records prior to 7 h 10 m 

 a. m. could be considered only as indicating changes in temperature from 

 period to period, and not absolute body-temperatures. These changes from 

 period to period have been used in obtaining the heat production during the 



