204 



Metabolism of Healthy Max. 



vaporized are compared only in periods where they were simultaneously deter- 

 mined. Consequently, in a few cases the figures per hour may not agree with 

 the results presented in previous tables. In general, it is seen from an inspec- 

 tion of the figures that there is a larger amount of water-vapor than carbon 

 dioxide excreted per hour. In a few instances, there is less water-vapor excreted 

 than carbon dioxide, and the ratio, taking the carbon dioxide as 100, may vary 

 from 100 : 91 with the subject H. C. A. up to 100 : 154 with the subject H. A. P. 

 The average of all subjects shows that for every 33.1 grams of carbon dioxide 

 produced there were 38.7 grams of water vaporized, the ratio being 100 : 117, a 

 value considerably lower than that found during the night. 



Table 83. Ratio of carbon dioxide eliminated to xoater vaporized during waking 



hours in rest experiments. 



The variations in this ratio are easily explained by the fact that there was a 

 much greater carbon-dioxide excretion in the day than during the night, while 

 as has been pointed out in this report and in the report of a large number of 

 experiments with men fasting, the water vaporized during the day period does 

 not differ materially from that vaporized during the night. Consequently, a 

 more or less constant water vaporization during the total 24 hours, when com- 

 pared with a large carbon-dioxide excretion in one period of the day and a low 

 excretion in another, would cause the marked variations in the ratios previously 

 pointed out. 



