BRIDGMAN. — THERMODYNAMIC PROPERTIES OF WATER. 



355 



calculated are shown in Figure 14 for the five standard temperature 

 intervals. The character of the curves is the same as that shown so 

 many times before, namely a rise to a maximum and then a fall at 

 0°, the abnormal behavior at the upper end of the 20° curve, and 

 the more or less regular behavior of the three curves for the higher 



23466789 10 U 12 

 Pressure, kgm. / cm.^ x 10^ 



Figure 14. The adiabatic rise of temperature of water against pressure. 



temperatures, with the crossing of the high temperature curves below 

 the low temperature curves at the higher pressures. In the preced- 

 ing paper only the approximate values for the very lowest tempera- 

 ture interval could be found. The calculation was based on the 

 mean value of the dilatation between 0° and 20°. The general 

 character of the curve was the same as that found here for 0°, 

 namely a rise to a maximum and then a fall. 



Finally it is possible to compute from the quantities in hand the 

 difference between the isothermal and the adiabatic compressibilities. 



This is found from the formula 



dpj^ \dpjr Cp \dT/p 



The 



results are shown in Figure 15. The general character of the results 

 is exactly the same as those previously given for the temperature 

 effect of compression. Here again, the results at the lowest tem- 

 perature agree with those of the previous paper which were based 

 on a mean value for the dilatation. 



