Metabolism Experiment No. 73. 



149 



In comparing the losses in body material with the losses in body-weight, it 

 is seen that aside from the discrepancy of over 100 grams on the first day, 

 the agreement is quite satisfactory. It is to be observed that on each of the 

 last 4 days the loss of body-weight is slightly greater than the loss of body 

 material computed from the income and outgo. 



Output of Heat. 



The summarized data for the total heat production per 2-hour period are 

 given in table 102. The total heat production is greatest on the first day and 

 gradually diminishes throughout the experiment. 



Table 101. Comparison of changes in body weight with balance of income and 



outgo Metabolism experiment No. 73. 



Jan. 



28-29. 



Jan. 



29-30. 



Jan. 

 30-31. 



Jan. 31- 

 Feb. 1. 



Feb. 

 1-2. 



Total for 

 6 days. 



Average 

 per day. 



Income : 



(a) Water consumed 



(&) Oxygen 



(c) Total (a + b) 



Outgo : 



(d) Urine 1 



(e) Feces 2 



(/) Carbon dioxide 



(g) Water of respiration 



and perspiration 



(h) Total (d+f + g) 



(i) Loss of body material 



(h-c) 



(j) Loss of body weight. . 



Grams. Grams. 



2082.30 2746.90 



544.24 547.86 



2626.54 3294.76 



Grams. 



2763.20 



533.04 



3296.24 



Grams. Grams. 

 1955.40 1075.90 



502.68 



2458.08 



485.54 



Grams. 

 10,623.70 

 2,613.36 



Grams. 



2124.74 

 522.67 



1561.44 



13,237.06 



2647.41 



2615.50 2770.80 



71.60 

 608.87 



684.22 



3908 . 59 



87.00 

 560.02 



636.05 



J .966.87 



2966.40 2143.90 

 51.10 



541.67 



602.31 



4110.38 



515.22 



569.17 



3228.29 



1192.10 

 482.00 

 543.34 



2217.44 



11,688.70 



209 . 70 



2,707.78 



3,035.09 



17,431.57 



2337.74 



41.94 



541.56 



607.02 



3486.31 



1282.05 

 1168.00 



672.11 

 686.00 



814.14 

 836.00 



770.21 

 779.00 



656.00 

 668.00 



4,194.51 

 4,137.00 



838.90 

 827.40 



1 The data in this column should not he confounded with urine data In other tables, 

 explanation, p. 66. 



2 Not included in the total outgo. See p. 148. 



See 



Balance of Energy. 



Allowing for the energy of the incompletely oxidized products of protein 

 katabolism, the total energy derived from all sources may be computed and com- 

 pared with the total heat production. This comparison is shown in table 103. 



On comparing the total energy derived from different sources with the total 

 heat production it is seen that on the first day the computed energy is 19 

 calories, or 1.0 per cent, smaller than the total heat production. The largest 

 discrepancy appears on the last day when the total as derived from all sources 

 is 66 calories, i. e., 4.3 per cent greater than the total heat production. In 

 these computations it should be borne in mind that the energy from the body 

 glycogen stored on the last day has been deducted from and not added to the 

 energy from the body protein and fat inasmuch as it represents energy stored 

 and not liberated. The largest discrepancy appears on the day on which 

 the smallest total heat production is measured. 



