DISCUSSION OF RESULTS. 



155 



are known to us, we computed the expected weight of our infants 

 as explained on p. 148, thus taking into account any variation from the 

 normal in birth-weight but assuming normal growth. These weights, 

 which are given in the last column of table 32, are compared with the 

 total heat-production in the chart in figure 57. As in all the foregoing 

 comparisons, no regularity is apparent. 



COMPARISON OF EXPECTED BODY-WEIGHT AND HEAT-PRODUCTION PER 

 KILOGRAM OF ACTUAL BODY-WEIGHT. 



We have plotted in the chart in figure 58 the values for the heat-pro- 

 duction per kilogram of actual body-weight for 24 hours for those of our 

 infants whose birth-weight was obtainable. The same absence of any 

 tendency toward regularity in the chart is seen as in the foregoing com- 



HEAT PER KILOGRAM OF BODY-WEIGHT PER 24 HOURS 



50 



55 



60 



65 



70 



75 



80 



85 



90 



Fig. 58. Chart showing the expected weights for the infants under observation and the heat- 

 production per kilogram of actual body-weight per 24 hours. 



parisons. We may therefore conclude that, aside from a slight tendency 

 for the total metabolism to be larger with increasing weight, no regular 

 relationship exists with infants between the total heat-production and 

 the body- weight, regardless of whether the body- weight was actually 

 found, computed from statistics of average values for normal infants, 

 or was the expected body-weight based upon the birth-weight. This 

 lack of correlation is likewise seen when the heat-production per kilo- 

 gram of body-weight for 24 hours is computed on the various weight 

 bases. It is clear, then, that some factor other than the body-weight 

 influences the heat-production. 



