Metabolism Experiment No. 69. 



81 



one-sixth of the amount apparently lost. The amounts of water ingested and 

 eliminated, together with the losses of preformed water and water of oxidation 

 of organic hydrogen, are shown in detail in table 40. 



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



With increased accuracy in the use of the special scale attached to the res- 

 piration calorimeter, weights of the subject, absorbers, chair, bedding, and 

 clothing were taken each morning at a specified time. These weights have been 

 compared with the different factors of income and outgo, and a balance has 



Table 41. Comparison of changes in body-weight with balance of income and 

 outgo Metabolism experiment No. 69. 



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

 explanation, p. 66.) 



been struck which is given in table 41. The total income of the subject consists 

 of water and oxygen consumed, while his total outgo is the quantity of urine 

 passed, carbon dioxide exhaled, and water of respiration and perspiration. 



Save on the last day the discrepancies appearing in table 41 are not great, 

 the average showing a marked improvement over the results obtained in 

 experiment No. 68. The average loss per day as computed is less by 22 grams 

 than that obtained by use of the weighing apparatus, an error which is 

 altogether too large for accurate work. 



Output of Heat. 



A summarized record of the measurements made with the calorimeter, the 

 heat used in vaporization of water and the sum of the heat corrections, to- 

 gether with the total heat production, is given in table 42. 

 6 



