160 



GASEOUS METABOLISM OF INFANTS. 



sidered in any sense as indicating uniformity, although a slight general 

 inclination is shown for older infants to have a higher heat-production 

 on this basis. 



With Howland's formula (see figure 62) the general picture presented 

 is essentially the same. The lowest value on this basis is 739 calories 

 with M. D., and the highest is 1,367 calories with J. M. The general 

 tendency for the older infants to have a higher heat-production may 

 again be inferred from an inspection of the chart in figure 62, though no 

 definite regularity in the relationship between age and heat-production 

 can be seen. 



Fig. 61. Chart showing age of infants and heat-production per square meter 

 of body-surface (Lissauer formula) per 24 hours. 



It should be borne in mind that, according to the currently accepted 

 views, the charts in figures 60, 61, and 62 should theoretically have been 

 straight lines — that is, that the points should have grouped themselves 

 more or less in a vertical manner. As a matter of fact, the grouping 

 appears to be more horizontal than vertical, thus showing by a visual- 

 ized method a complete absence of correlation in the heat-production 

 per square meter of body-surface with infants of different ages. 



With such large variations it was highly improbable that further 

 comparisons on this basis would lead to any explanation of the dis- 

 crepancies. Nevertheless, so at variance are these results that we have 

 deemed it necessary to make all possible computations and comparisons 



