DISCUSSION OF RESULTS. 



159 



for J. M. An inspection of the plot shows no average value, for even 

 when we omit the extreme values for M. D., A. C, E. F., and J. M., 

 the limits still remain 771 to 1,108. A larger number cluster around 

 875 calories, but there are too many scattering values to permit the 

 use of 900 calories as an average value. If a line were drawn passing 

 through the greatest number of points in this curve, it would indicate 

 that there is a tendency for the older infants to have a higher heat- 

 production, and yet, even with infants of the same age, wide variations 

 are to be observed. This chart, therefore, leaves no doubt as to the 

 lack of constancy in heat-production per unit of body-surface for the 

 infants under observation in this research. 



675 725 775 825 875 925 975 1025 1075 1125 



175 1225 



Fig. 60. Chart showing age of infants and heat-production per square meter 

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



In the charts in figures 61 and 62, a comparison is made of the 

 same two factors, using as a basis the Lissauer and Howland formulas 

 respectively. The substitution by Lissauer of 10.3 for the constant 

 11.9 in the Meeh formula has not materially altered the picture as is 

 shown by comparing the charts in figures 60 and 61. In the latter, 

 the minimum value is 753 calories with M. D., and the maximum 1,432 

 calories with J. M., with a tendency for some of the points to collect 

 about the value 1,025 calories. The plot in general can not be con- 



