POLYMORPHISM AT HIGH PRESSURES. 



137 



the lower value is the more accurate, when one considers the contrast 

 in the methods. The lower value was obtained with both phases in 

 contact, and is the average of results differing only 3 kgm. for oppo- 

 site directions of the transition. Wallace's value was obtained with 



120 



.00 >- 



200 400 600' 

 Pressure, kgm. /cm. ^"^ 

 Ammonium Bromide 



£ ^'^6 200 400 600 

 £ Pressure, kgm. /cm. ^ 



^Ammonium Bromide 



Fig. 24. Fig. 25. 



Figure 24. Ammonium Bromide. The observed equilibrium pressures 

 and temperatures (circles) and the observed differences of volume (crosses). 



Figure 25. Ammonium Bromide. The calculated latent heat and the 

 change of internal energy. 



TABLE Xir. 

 Ammonium Bromide. 



