The calorimetric methods described in the preceding paper have been used to measure thermodynamic properties of solid and liquid krypton. Besides heat capacities and vapour pressures over a range of temperatures, the following were obtained: heat of fusion = 392.0 ± 2.3 cal mole-1, T (tr. pt.) = 115.776 °K, p(tr.pt.) = 548.7 ± 0.1 mm, heat of vaporization at 116.85 °K = 2179.2±0.9 cal mole-1 and at the normal boiling point = 2162 ± 1 cal mole-1. A number of properties of solid argon and solid krypton has been derived, in particular, the apparent Debye characteristic temperatures at 0°K and as a function of temperature, the heats of sublimation at 0°K, the static lattice energies and the zero point energies. The results of the thermal measurements on the solids have been correlated with expansivity and compressibility results and certain inconsistencies resolved. The calorimetric results are shown to be internally consistent. The shapes of curves of ΘD (T) against temperature indicate that anharmonic contributions to the vibrational properties of solid argon and solid krypton are appreciable, particularly in the region T > Θ0/10. In the region below the melting points, Cp for both argon and krypton increases rather rapidly with temperature. This is interpreted as an effect of formation of vacancies in the solids. Enthalpies of formation are found to be 1280 ± 130 cal mole-1 for argon and 1770 ± 200 cal mole-1 for krypton. These are about two-thirds of values estimated from theory. An effect of vacancy formation may also be seen in the vapour pressures.