GASEOUS METABOLISM DURING REST. 



519 



per square meter of body-surface. Using the data given in tables 129 

 and 130 and comparing them with those found on the corresponding 

 nights with the group respiration chamber, we may determine the 

 general trend of the metabohsm by two entirely different methods, 

 guch a comparison is made in table 132. 



Table 132. — Comparison of measurements of metabolism with different diet levels and 



apparatus — Squad A. 

 (Squad averages per 24 hours.) 



1 Averages from determinations on individual subjects who were in post-absorptive condition , 

 and lying awake. 



* Computed from values on Sept. 29-30, Nov. 24-25, and Jan. 26-27, in table 131. 

 3 See table 133 (footnotes) for explanation of period averages. 



* (Normal values —Values at end of reduced diet) XlOO 



Normal values 



Considering first the heat computed per kilogram of body-weight 

 per 24 hours, we find that during normal diet, the value was slightly 

 larger with the group chamber. At the period of minimum weight and 

 at the end of the period with reduced diet the heat output was sHghtly 

 lower with the group chamber. The percentage decrease from the 

 beginning to the end of the experiment is also included in the able. 

 With the individual measurements this was 11.5 per cent; witth the 

 group chamber it was 18.2 per cent. While the agreement is by no 

 means perfect between these two methods of measurement, both give 

 clear indications of a decided change even in the heat output per kilo- 

 gram per 24 hours. When one considers that the experimental pro- 

 cedures differed in almost every detail, the agreement is perhaps as 

 close as one could expect. 



On the basis of body-surface area the records show that during 

 normal diet a somewhat larger value was obtained with the group 

 chamber, but at the minimum weight and at the end of the reduced 

 diet the conditions are reversed. In any event the agreement between 

 the two series is strikingly close, considering the wide differences in the 

 methods of experimentation. The actual percentage decrease noted 

 with the individual respiration apparatus was 16.2 per cent and with 

 the group chamber 22.1 per cent. Thus, with both types of respira- 



