400 



BABCOCK. 



temperature in °C. and the second, c„ from Table II. In the third 

 column, for every 10° C. is given the correction term to be added to c„ 

 to give Cs2- The fourth column gives Cg^ and the fifth gives Cgj, whose 

 values, it will be noted, are negative. All of the specific heats are 

 expressed in Joules per gram degree. The values of the saturation 

 specific heats given for 35°, 45°, 55°, etc., were obtained by interpola- 

 tion, not computed. 



The saturation specific heat of the liquid is shown by the heavy 

 curve in Figure 10, and the saturation specific heat of the vapor is 

 shown in Figure 11. 



Figure 11. 



4. Comparison with Previous Results. 



Osborne and Van Dusen,^^ in their recent work, have discussed 

 briefly the measurements of the specific heat of ammonia made previ- 

 ously to their own investigation. There is little to add to this except 



22 Osborne & Van Dusen, Bull. Bur. of Standards, 14, p. 397. 



