132 



Influence of Inanition on Metabolism. 



Materials absorbed from food. Feces amounting to 70.30 grams were passed 

 at 9.45 a. m., January 11, but it was obviously impossible that they resulted 

 from the food consumed during the same day. Defecations occurred on the 

 3 days following the experiment, and the separation as made gave 219.3 

 grams as the amount of feces for this day. Previous experience had already 



Table 87. Weight, composition, and heat of combustion of food Metabolism 



experiment No. 72. 



Table 88. Elements and materials absorbed from dry matter of food ' Metabolism 



1 To obtain the amounts of the elements of dry matter absorbed, the average percentages 

 of elements of water-free substance absorbed in experiments Nos. 70, 74, and 76 are used. 

 These averages are as follows : Nitrogen, 89 per cent ; carbon, 94 per cent ; hydrogen, 94 per 

 cent; oxygen, 97 per cent; ash, 59 per cent. (See p. 133.) 



2 In terms of body material. 



shown that a satisfactory separation of feces from a food experiment lasting 

 only 1 day was not to be expected, and since the amount found was abnormally 

 large, it is believed that the separation as shown by the discoloration of the 

 feces with lampblack was erroneous. It therefore became necessary to estimate 

 the quantity of material absorbed from the food during this experiment. Since 

 the diet consisted essentially of milk it was not difficult to obtain an average 



