450 K. Tsnruta on some Thermal Properties of 



values of a (=(—£-! j, deduced for the same range of tempe- 

 rature from the elastic forces at different pressures, are directly 

 proportional to one another." This remark applies also to the 

 present case. Graphically it means that the isometrics are 

 very nearly straight, and also from equation (1) we have 



XSt)« v-a~ r T 2 (v + 



py- 



so that when T is sufficiently great the first term on the right- 

 hand side supersedes the second, and consequently 









~v f -a ~ 



const. 



Thus the 



sight. 



above 



relation 



appears les. 

 Fig. 4. 



3 remarkable than at first 



Isopiestics. 



The following Tables give a few numbers relating to iso- 

 piestics (see fig. 4). 



