114 



Influence of Inanition on Metabolism. 



An inspection of the figures in column a shows that the relative humidity 

 in the chamber steadily decreased during the 4 days, thus explaining the 

 continual loss of moisture from the bedding and furniture. 



The total water of respiration and perspiration diminished from day to 

 day, amounting to 744.84 grams on the first day and 517.66 grams on the 

 fourth day. 



Cutaneous excretion of nitrogenous material. During this experiment and 

 experiment No. 72 immediately following there was an average elimination of 

 nitrogen of 0.029 gram per day found in the perspiration. 



Table 67. "Weight, composition, and heat of combustion of urine Metabolism 



experiment No. 71. 



(a) Weight grams . . 



(6) Water do 



(c) Solids (a b) do 



(d) Ash do 



(e) Organic matter (c d) do 



(/) Nitrogen do 



(g) Carbon do 



(A) Hydrogen in organic matter, 



grams 



(i) Oxygen (by difference) in organic 



matter, e {f+g + h) . . .grams.. 



( j) Phosphorus do ... . 



(k) Phosphoric acid by fusion (P 2 5 ), 



grams 



(I) Sulphur grams. . 



(m) Sulphur trioxide (S0 3 ) . . . .do. . . . 

 (n) Heat of combustion. . . .calories. . 



Elimination of Cakbon Dioxide and Absorption of Oxygen. 



From the analyses of the respiratory gases, the quantities of carbon dioxide 

 and oxygen residual in the chamber at the end of each period are obtained. 

 These are recorded in columns a and c of table 69. The weights of carbon 

 dioxide exhaled and the amounts of oxygen consumed by the subject are shown 

 in the same table in columns b and d, respectively. 



There are especially noticeable differences in the absolute amounts of carbon 

 dioxide present in the chamber, both from one period to another and from day 

 to day. The residual amounts tend to diminish as the experiment progresses, 

 while on the other hand the amounts of oxygen tend to increase. For instance, 

 the residual oxygen varies from 831.9 liters at 11 a. m., January 7, to 1090.2 

 liters at the end of the experiment. Corresponding to these wide differences 

 in the amounts of oxygen, there are of course variations in the absolute 

 percentages of oxygen in the air, but as has been shown by Zuntz, Durig, and 



