Metabolism Experiment No. 71. 



117 



Table 69. Record of carbon dioxide and oxygen Continued. 



That the amount of carbon dioxide eliminated is greatest on the first day is 

 largely due to the extra muscular exercise taken during the second period. 

 During this period it is seen that there were 105.2 grams of carbon dioxide 

 eliminated, while for the same period on the subsequent days from 45 to 55 

 grams were exhaled. The minimum carbon dioxide elimination was reached 

 on the last day. 



The largest consumption of oxygen occurred on the first day and the smallest 

 on the last day. The marked increase in the absorption of oxygen that would 

 naturally be expected as a result of extra muscular work is not apparent during 

 the second period of the first day. The difficulty of determining the respiratory 

 quotient and especially the oxygen consumption for short periods during 

 severe muscular work has previously been pointed out. 26 * 



In general, the falling off in the consumption of oxygen from day to 

 day is roughly proportional to the decreasing quantities of carbon dioxide 

 eliminated. 



Elements Katabolized in the Body. 



The amounts of elements katabolized, as computed from the result of the 

 various elementary analyses, are given in table 70. 



Elements and materials katabolized in the body. The elements katabolized 

 from the body and the amounts of katabolized materials (computed by means 

 of the formulas) are given for each day in table 71. Of especial significance 



'U. S. Dept. Agriculture, Office of Exp. Sta. Bui. 175. 



