PHYSICAL AND PHYSIOLOGICAL MEASUREMENTS. 



87 



women of different statures. Comparable values for carbon-dioxide 

 elimination are represented in diagram 11. The straight lines are 

 given by the equations for total men and women in table 27. 

 k'- Because of the relatively small numbers of individuals for statistical 

 work, the medium value of the correlation between stature and gaseous 

 exchange, and the wide variation in stature and gas volume, the 

 means show great irregularity. The straight line probably represents 

 the four sets of averages as well as any other single curve of a 

 higher order. At least it does not seem worth while at the present 

 time to try any other equation until further materials are available. 



360 



340 



320 



300 



260 



3-10 



220 



200 



-/,,' ' 



148 



/. i 



'fit 



168 



I7S 



ISO 



18.1 



13?. 



196 



STATURE IN CENTIMETERS 



DIAGRAM 10. Mean oxygen consumption by men and women of various statures. 



In this and the preceding sections we have shown that oxygen 

 consumption and carbon-dioxide excretion are correlated with both 

 body-weight and stature and have discussed the degree of the relation- 

 ship. We now have to inquire whether the correlations between physi- 

 cal characters and gaseous exchange differ consistently in the case of 

 the two gases. It might at first appear that these two values should 

 be identical, but that the correlations between the physical characters 

 and gaseous exchange would not necessarily be identical for the two 

 gases is shown by the fact that the correlation between the two meas- 

 ures of gaseous exchange, while necessarily very high indeed, is not 

 perfect. This point is brought out by the discussion of the correlation 

 between oxygen consumption and carbon-dioxide production in 

 Chapter III. 



