80 Metabolism of Healthy Man. 



A special experimental period to study the metabolism during the process 

 of dressing and undressing began at 12 h 15 m p. m. and continued 1 hour. At 

 the beginning of this period the subject rose, opened the food aperture to 

 obtain the clinical thermometer, and then sat down. Later he rose again to 

 replace the thermometer and then sat down for a few minutes. He then rose, 

 lowered the end shields from around the heat absorbers, 1 lifted the chair in 

 which he had been sitting to its swinging supports, sat down in it, and was 

 weighed. He next removed the chair and at 12 h 28 m p. m. began to undress. 

 The subject then suspended the chair again and sat in it without clothing 

 while being weighed. The length of time from the moment the subject re- 

 moved the last piece of clothing until he began to dress again was 2 m 10 s . 

 After he was weighed he took down the chair, dressed, and then went to the 

 food aperture and opened it. He next raised the portion of the shields which 

 he had lowered and sat down in the chair and remained quiet until the end 

 of the period. 



The pulse-rates as taken by the subject for the 3 hours of the rest experi- 

 ment and the 1 hour of the undressing experiment were as follows : 8 h 07 m 

 a.m., 71; 8 h 40 m a.m., 72; 9 h 15 m a.m., 69; 9 h 45 m a.m., 66; 10 h 15 m a.m., 

 73 ; 10 h 45 m a. m., 71 ; ll h 15 m a. m., 62 ; ll h 50 m a. m., 69 ; 12 h 40 m p. m., 75. 

 The sublingual body-temperatures were at 9 h 15 m a. m., 98.1 F. ; 12 h 15 m p. m., 

 98.2 F.; l h 15 m p.m., 98.1 F. The results of the metabolism as obtained 

 for the 3 hours of rest and 1 hour of activity are given in table 44. In this 

 and all the subsequent experiments of this type, it was practicable to subdivide 

 the 3-hour rest experiment into two periods of equal length. 



METABOLISM EXPERIMENT No. 159. 



Subject, H. L. W., February 24, 1905. Age, 26 years 11 months; 

 height, 164 cm. ; weight without clothing, 51.6 kilos. 



The subject entered the chamber at about 1 p. m., after a dinner consisting 

 of roast beef, potato with gravy, a dish of peas, 1 biscuit, bread pudding, and 

 a glass of milk. He was weighed at l h 20 m p. m. and the first period began 

 at 2 h 22 m p. m. At 2 h 25 m p. m. he went to the food aperture. Most of the 

 time until 5 h 22 m p. m. he was writing. The undressing period began at 

 5 h 22 m p. m. and continued to 6 h 22 m p. m. The subject during this latter 

 period followed the same routine a? during the corresponding period in the 

 preceding experiment (experiment No. 158), resting at the beginning of the 

 period, procuring the thermometer and replacing it in the food aperture and 

 then lowering the shields and suspending the chair. He was then weighed 

 and afterwards took down the chair, undressed, suspended the chair, and was 

 weighed again. He then dressed, went to the food aperture, raised the shields, 

 and at 5 h 54 m p. m., sat down and remained quiet until the end of the period. 

 The length of time that the subject was entirely undressed was 3 m 50 s . 



1 For a description of this apparatus see Carnegie Institution of Washington Pub- 

 lication No. 42, p. 125. 



