Metabolism Experiment No. 72. 



133 



absorption based upon results in other experiments. From data obtained 

 in two 3-day experiments with food made later with this subject, and one 

 experiment of 3 days' duration already presented, i. e., experiment No. 70, 

 average results were found and from these data it was possible to compute 

 the amounts of the elements in the dry matter absorbed. This estimate is 

 recorded in table 88. By means of the formulas previously given, the quantities 

 of protein, fat, and glycogen in terms of body material absorbed from the food 

 have been computed and are also recorded in this table. 



Table 89. Amounts of protein, fat, and glycogen absorbed 1 from food and energy 

 of each 2 Metabolism experiment No. 12 (Jan. 11-12, 1905). 



Protein : 



(a) Amount grams. 



(b) Energy calories. 



Fat 



(c) Amount grams. 



(d) Energy calories. 



33.30 



188 



121.69 

 1161 



Glycogen : 



(e) Amount grams.. 72.30 



(/) Energy .calories. . 303 



(g) Total energy (b + d + /), 



calories 1652 



1 In terms of body material. (See p. 132.) 



2 Factors for heat of combustion per gram of protein, 5.65 calories ; of fat, 9.54 calories ; of 

 glycogen, 4.19 calories. 



Energy of material absorbed from food. Having computed the amounts of 

 nutrients absorbed in terms of body material, the energy was found as hereto- 

 fore by use of the factors for heat of combustion. The results are given in 

 table 89. 



Table 90. Comparison of changes in body-weight with balance of income and 

 outgo Metabolism experiment No. 12 (Jan. 11-12, 1905). 



Income: Grams. 



(a) Food 1359 . 30 



(&) Water consumed 735.50 



(c) Oxygen 516 . 85 



(d) Total (a + b + c) 261 1 . 65 



Outgo: 



(e) Urine l 1395 . 50 



(/) Feces 70.30 



Outgo Continued. Grams. 



(g) Carbon dioxide 524.58 



(h) Water of respiration and per- 

 spiration 544.84 



(i) Total (e+f + g + h) 2535.22 



(j)Gain of body material (di). . +76.43 

 (k) Gain of body-weight + 49 . 70 



1 The data in this line should not be confounded with urine data in other tables. (See ex- 

 planation, p. 66.) 



Changes in Body-Weight Compared with Balance of Income and Outgo. 

 In connection with the data given below, which record the amounts of intake 

 and output of the body, the fact that the amount of feces is lacking in the 

 preceding tables of this experiment does not vitiate the results shown in table 

 90, for in this table we are concerned only with the amounts of feces passed 

 from 7 a. m., January 11, to 7 a. m., January 12, and not with the relation of 

 such amounts to the metabolism of this day. As a matter of fact, the 70.30 

 grams of feces recorded in line / were from food eaten several days prior to 



