Metabolism Experiments Nos. 103-157. 39 



For the period from 1 a. m. to 7 a. m., when he was sound asleep inside the 

 respiration chamber, the results present, we believe, a true picture of metab- 

 olism during sleep with this man, and hence they are here reported. 



The subject upon the day preceding had been subsisting upon a diet contain- 

 ing a large proportion of carbohydrate. He entered the respiration chamber 

 the evening before, and retired at 11 o'clock, the usual time. The regular 

 observations began at 1 a. m. and continued until 7 a. m. The measurements were 

 made in two periods of 3 hours each, i. e., from 1 a. m. to 4 a. m. and from 

 4 a. m. to 7 a. m. During the whole experiment the subject was in bed covered 

 with a blanket. 



The metabolism during this experiment is indicated in table 44, which sum- 

 marizes the carbon dioxide exhaled, the oxygen absorbed, the water vaporized, 

 and the heat elimination during these periods, together with the respiratory 

 quotient. Fortunately, for purposes of comparison, the katabolism of this par- 

 ticular subject is very well known, as it had been studied in a number of 

 previous experiments. Unfortunately, we have reason to believe (although, 

 as the subject did not wear the rectal thermometer, we can not be absolutely 

 certain) that his body-temperature was somewhat above normal during the 

 night. During the following forenoon the temperature as registered on the 

 clinical thermometer was 101.0 F. Under these circumstances 1 we believe the 

 metabolism during this night to have been somewhat above the normal for 

 this subject. An inspection of the data of other experiments made with him 

 show that this was the case. The pulse-rate was not recorded. 



METABOLISM EXPERIMENT No. 110. 



Subject, J. T. H., February 20, 1905. Age, 20 years; height, 

 170 cm.; weight without clothing, 56.0 kilos. 



The experiment was originally planned as part of a series to study the in- 

 fluence of mental work on metabolism, but unfortunately the control experiment 

 was not made and the results of this experiment were therefore not included 

 in the publication of that series. The subject (a student) occupied the calorim- 

 eter chamber while taking a regular college examination in the subject of 

 philosophy and reported himself as comfortable during the experiment. Din- 

 ner was eaten at the usual time (about 1 p. m.) and consisted of a small 

 amount of roast beef, mashed potatoes with gravy, a slice of whole- wheat 

 bread, and a piece of apple pie, and a little later the subject entered the cham- 

 ber. He was weighed at l h 12 m p. m. 



During the experiment the sublingual body-temperature was taken with a 

 clinical thermometer, being 98.4 F. at the beginning and 98.1 F. at the end. 

 The pulse as counted by the subject was 72 at 3 p. m. and 66 at 4 h 15 m p. m. 

 The metabolism is given in table 44. 



1 Carpenter and Benedict, Am. Journ. Physiol., 1909, 24, p. 187. 



