152 



GASEOUS METABOLISM OF INFANTS. 



of bodj r -weight per 24 hours for all of our infants. An inspection of 

 these points shows conclusively that there is no regularity in the values 

 for the different infants. The heavy babies, H. T. and E. G., had a 

 low energy transformation per kilogram of body-weight, but two very 

 young infants, A. C. and M. D., had similarly low values, although 

 in general the infants of the smallest body-weight have high values. 



Fig. 54. Chart showing the actual body-weight of infants and the heat-production per 

 kilogram of body-weight per 24 hours. 



Thus it is seen that in comparing the metabolism of different infants 

 we have to deal with some factor or factors other than body-weight. 

 Inasmuch as the state of nutrition is not indicated by the records of 

 the body-weight at the time of the observation, it is obviously impos- 

 sible to discuss the influence of this factor simultaneously with the 

 total body-weight without further data. 



COMPARISON OF NORMAL BODY-WEIGHT AND TOTAL HEAT- 

 PRODUCTION IN 24 HOURS. 



Since the infants were mostly under weight, a comparison between 

 the metabolism as measured and the normal weight of infants at the 

 same age is justifiable and may prove suggestive in interpreting the 



