74 



BRIDGMAN. 



There seem to be no previous determinations of the effect of pres- 

 sure on the transition point, nor of the change of volume or the latent 

 heat at atmospheric pressure. The previously listed value of the 

 transition temperature is 92°, against 87.7° found by extrapolation. 

 Gossner * also states that the transition is very sharp (as was found 



E 4 



. 1000 aooo 3000 



E Pressure, kgm./cm.^ 



•^ Ammonium Sulfocyanide 



Figure 8. Ammonium Sulfocyanide. The computed values of the heats 

 of transition and the changes of internal energy. 



above), that the melting point is 169°, and the specific gravity 1.305 

 at room temperature. 



Several fairly consistent measurements of the difference of com- 

 pressibility of the two phases were made. The results are shown in 



TABLE II. 

 Ammonium Sulfocyanide. 



