Metabolism Experiment No. 69. 



75 



were determined in two periods of 3 hours each immediately preceding the 

 experiment. In this experiment as in experiment No. 68, there were certain 

 changes in the weights of the chair, bed, bedding, etc. The amounts of water 

 involved in these changes are noted at the end of the table. While inspection 

 of the humidity conditions in this experiment showed that the losses must have 

 been fairly regular for the first, third, and fourth days, the gain on the second 

 day apparently occurred during the last 4 periods of the day and it was so 

 apportioned. 



Table 35. Weight, composition, and heat of combustion of urine Metabolism 



experiment No. 69. 



Dec. 

 16-17. 



Dec. 

 17-18. 



Dec. 



18-19. 



Dec. 



19-20. 



Total for 

 4 days. 



{a) Weight grams . . 



(&) Water do 



(c) Solids, a b do 



(d) Ash do 



(e) Organic matter, cd do. . . . 



(/) Nitrogen do 



{</) Carbon do. . . . 



(h) 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 ), 



gr ams 



(I) Sulphur grams. . 



(m) Sulphur trioxide (S0 3 ) do 



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



451.8 



415.75 



36.05 



6.64 



29.41 



10.09 



8.31 



1.81 



9.20 

 .409 



.936 



.550 



1.374 



92 



590.01 



545.08 



45.02 



6.43 



38.59 



14.26 



9.97 



2.66 



11.70 

 .520 



1.192 



.738 



1.844 



112 



762.3 

 714.81 

 47.49 

 6.56 

 40.93 

 15.04 

 10.37 



2.67 



12.85 

 .463 



1.060 



.837 



2.089 



120 



742.1 



700.32 



41.78 



5.57 



36.21 



12.97 



9.42 



2.45 



11.37 

 .455 



1.043 



.790 



1.971 



110 



2546.3 



2375.96 



170.34 



25.20 



145.14 



52.36 



38.07 



9.59 



45.12 

 1.847 



4.231 



2.915 



7.278 

 434 



The total water of respiration and perspiration in this experiment varied 

 considerably from day to day. On the second day there were 160 grams more 

 water vaporized from the lungs and skin than on the first, while on the last day 

 the amount of water was slightly less than on the first. 



Cutaneous excretion of nitrogenous material. During this experiment and 

 No. 70 following, the subject wore continuously a union suit and a pair of 

 stockings which had been previously thoroughly washed and extracted with 

 distilled water. Before the experiment began the subject washed himself 

 thoroughly without using soap. He then took a shower bath and finally 

 sponged his whole body with clean cheesecloth and distilled water. After the 

 termination of experiment No. 70 the water used to extract the clothing and 

 sponge the body of the subject contained 0.722 gram of nitrogen, corresponding 

 to an elimination of 0.013 gram per day for the 7 days the subject was in the 

 respiration chamber. This excretion of nitrogen has not been considered in any 

 of the computations. 



