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. 1964 Nov-Dec;68A(6):567–578. doi: 10.6028/jres.068A.054

Figure 3.— Demonstration of the remaining thermodynamic inconsistency between eqs (1) and (7) involving the He3 latent-heat data, (L, P3), of Weinstock, Abraham, and Osborne [4], [55]; the (P3, P4) intercomparisons of Sydoriak and Sherman [46]; and the 1958 He4 Scale [2], T58(P4).

Figure 3.—

The indicated value of SL(1.0°) is the average of nine values calculated from eq (7) for the WAO (L,P3) data and is about 1 percent lower than the 1962 He3 Scale value for that entropy, eq (4). The solid circles are the individual values of the theoretical constant, (a/R), in eq (1) calculated for each (P3, T58) data point as Fx(P3, T58) — [SL(1.0°) T58/R] using the indicated average value of SL(1.0°).