Metabolism Experiment No. 59. 



47 



as yet no simple arrangement seems to be possible for securing the body- 

 weight of the subject at the end of each period without the extraneous muscular 

 effort of adjusting the furniture in the chamber and suspending the weighing 

 chair on the special scale provided for the purpose. Therefore the weighings 

 are usually made but once each day. From the weights so found, the changes 

 in body-weight from period to period were computed. The details of such 

 computations are shown for the first day of this experiment in table 15. 



The income consists of oxygen and water consumed, and the outgo, of water 

 of respiration and perspiration, carbon dioxide, and urine. During the period 



Table 15. Change of body-weight during different periods of the day Metabolism 

 experiment No. 59 (December 18-19, 1903). 



Time. 



Income. 



(a) 



Oxygen 



con- 

 sumed. 



(b) 



Water 

 con- 

 sumed. 



Outgo. 



(O 

 Water 



of 

 respira- 

 tion. 1 



(d) 

 Carbon 

 dioxide 

 elimina- 

 ted. 



(e) 

 Urine. 



(/) 



Balance 

 (o+6) 



-(c+d+e). 



(ff) 



Body- 

 weight. 



7 a.m 



7 to 10 a.m 



10 a.m 



10 a.m. to 1 p.m 



1 p.m 



1 to 4 p.m 



4 p.m 



4 to 7 p.m 



7 p.m 



7 to 10 p.m 



10 p.m 



10 p.m. to 1 a.m 



1 a.m 



1 to 4 a.m 



4 a.m 



4 to 7 a.m 



7 a.m 



Grams. 

 400.00 

 400.00 



400.00 



142.50 



Orams. 



10l".76 

 88 '.82 

 88/29 

 98^58 

 81.70 

 74.12 

 65.29 

 71.99 



Kilos. 

 67.796 



67.597 



67.668 



67.282 



67.018 



66.778 



66.595 



66.478 



66.355 



1 Includes also water of perspiration. 



from 7 to 10 a. m. there was a total loss from the body of 198.64 grams over 

 and above the income of oxygen and water. Thus the body-weight at 10 

 o'clock was less by 199 grams than it was at 7 a. m. During the next period the 

 income was slightly larger than the output and therefore the body-weight was 

 slightly increased. The computations for the remaining periods of the day, 

 with the final corrected body-weight, appear in the table. 



Unfortunately, in this particular experiment the special scale for weighing 

 the man had not been installed and the body-weights were very defective, but 

 from later observations on this same subject it is assumed that when naked 

 he weighed 67.796 kilos. That this figure is very nearly correct seems fairly 



