BRIDGMAN. — MERCURY UNDER PRESSURE. 



381 



Figure 9 shows the compressibility at these two temperatures and 

 different pressures. The compressibility plotted in Figure 9, is the 



X 



>- 



-J 



eg 

 <o 



u 

 cr. 



o 

 o 



25 



C.^ [bl;to;j:;;u;u;i;u3^;nr;;;M;::;^;..;;;;;};s;;^ii:;;ii,j;;t;::;u;;4n:i;«f;pKi;;;ft;::j;iuii:: 



I 23450789 10 II 



PRE55URE ,KGM/CM'XI0:' 



Litiiii^;« 



12 



Figure 9. The compressibility of mercury at two different temperatures. 

 This compressibiUty is the instantaneous compressibiUty ( y I • 



thermodynamic quantity ( ^ ) , which is slightly different from the ordi- 

 nary meaning of compressibility as used above. It may be obtained at 

 0° directly from the parabolic formula and the deviation curve. At 22° 

 the results obtained from the parabolic formula and the deviation curve 



