30 



Metabolism of Healthy Man. 



METABOLISM EXPERIMENT No. 103. 



Subject, B. F. D., November 23, 1903. Age, 22 years; height, 

 170 cm.; weight without clothing, 68.4 kilos. 



In connection with a large number of experiments, it was found that the 

 body-position seemed at times to exert a marked influence upon metabolism, 

 and hence it appeared desirable to get some definite data regarding the metab- 

 olism under the various conditions of lying, sitting, and standing. This 

 experiment was designed with the purpose of studying this problem, but the 

 research was not carried farther at that time, owing to the press of other work. 



The subject was a young man, a student in Wesleyan University, and was 

 also the subject of a number of subsequent experiments which have been pub- 

 lished elsewnere. 1 He entered the respiration chamber in the early morning 

 wearing only a moderately heavy woolen union suit and a pair of thick-soled 

 shoes. The object of making the experiment with the union suit was to note 

 the effect on heat production of varying amounts of clothing, but this study 

 was not carried farther. 



During the whole experiment the temperature inside the respiration chamber 

 remained not far from 20 C, and although the subject wore only this heavy 

 union suit, weighing 580 grams, he did not complain of any discomfort as a 

 result of the temperature. During the time the subject was required to lie 

 in bed without clothing over him, i. e., from 10 h 29 m a. m. to 12 h 37 m p. m., he 

 was not asleep, but was lying quietly. From 12 h 37 m to 3 h 02 m 32 s p. m. he was 

 sitting quietly, and from 3 h 02 m 32 s to 5 h 33 m p. m. he was standing. During the 

 experiment he took his temperature with a clinical thermometer in the mouth, 

 and the records axe as follows : 10 h 20 ra a. m., 98.4 F. ; 12 h 30 m p. m., 98.6 F. ; 

 3 p. m., 98.3 F. ; 5 h 33 m p. m., 98.8 F. 



Inasmuch as the subject held the stipulated positions without any variations 

 during the whole period, there were no minor muscular movements to be 

 recorded as incidental to the experiment. Determinations were made of the 

 water vaporized, carbon-dioxide elimination, oxygen consumption, and heat 

 elimination. 



Table 17. Water vaporized Metabolism experiment No. 103. 



1 Benedict and Milner, U. S. Dept. Agr., Office Exp. Stas. Bui. 175, 1907; Benedict 

 and Carpenter, ibid.. Bui. 208, 1909; Benedict, Carnegie Institution of Washington 

 Publication No. 77, 1907. 



