298 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



TABLE VI — continued. 



Values of C p at Saturation from Planck's Equation, using: 

 c. Ramsay and Young's 

 Experimental Data. 



d. Battelli's "Table M." 



to represent the same data. This alternative computation seems 

 worth while, partly because of the automatic smoothing effect which 

 the use of an equation based on all the observations necessarily has, 

 but more because it means a redistribution of the dependence of the 

 computed values of C p on the volume measurements on the one hand 

 and the new H formula on the other. The results of eleven computa- 

 tions of this kind are summarized in the second part of Table VI., and 

 five of them are plotted as circles in Figure 12. 



Two conclusions can be drawn from Figure 12. In the first place, 

 both sets of points agree in confirming the conclusion reached on 

 page 272, that Knoblauch's saturation curve is nearer the truth than 

 Thomas'. It will probably be argued this confirmation is simply a 

 circular fallacy, inasmuch as the H formula of this paper was based 

 on Knoblauch's values of C p and might therefore be expected to lead 

 back to them in the end. This is true only in a very small measure. 

 The dependence of H on C p is such that comparatively large changes 

 in the C p curves used at the beginning of this paper would have made 



