METABOLISM AS AFFECTED BY GROWTH. 



137 



Rubner's classic experiments 1 unfortunately give no values which are 

 suitable for comparison. The data of Magnus-Levy and Falk 2 for 

 both boys and girls are especially suitable for use and have all been 

 plotted on our charts. Owing to the extensive criticisms applicable 

 to the work of von Willebrand, 3 we do not feel justified in employing 

 any of his data for comparison purposes, although it is not improbable 

 that certain scattered minimum values are normal. Olin's experi- 

 ments 4 were likewise made under conditions that can not be looked 

 upon as basal. Finally, values have been plotted for such of Murlin 

 and Hoobler's 5 children as were strictly normal, and also the results 

 obtained in the extended series of Du Bois 6 and his collaborators are 

 plotted, although criticism has been raised of these latter as to the 

 selection of minimum periods and the degree of muscular repose. 



Cals. 



TOTAL CALORIES REFERRED TO AGE. 



BOYS. 



Yre. 1 2 3 4 5 6 7 



FIG. 24. Basal heat production of boys per 24 hours referred to age (earlier investigators). 



Comparison for boys. The points representing the children studied 

 by us are so numerous as to make it unwise to reproduce them on the 

 same chart with those obtained by former investigators. Conse- 

 quently, points for the results found by the earlier workers have been 

 plotted and the line corresponding to the general trend shown in our 

 studies as laid on the chart in figure 22 has been placed for comparison 

 on the chart in figure 24, which gives the results for boys. The 



1 Rubner, Beitrage zur Ernahrung im Knabenalter, Berlin, 1902. 



2 Magnus-Levy and Falk, Archiv f. Anat. u. Physiol., 1899, Suppbd., p. 314. 



3 von Willebrand, Finska Lakaresallskapets Handlingar, 1907, 49, p. 417. 



4 Olin, Finska Lakaresallskapets Handlingar, 1915, 57, p. 1434; also Skand. Archiv f. Physiol., 



1915, 34, p. 414. 



6 Murlin and Hoobler, Am. Journ. Diseases of Children, 1915, 9, p. 81. 

 6 Du Bois, Arch. Internal Med., 1916, 17, p. 8S7. Olmstead, Barr and Du Bois, Arch. Internal 



Med., 1918, 21, p. 621. 



