Monte Carlo calculations of the pair correlation functiong(r)and numerical solutions of the Percus-Yevick equation are reported for a Lennard-Jones potential, the krypton potential of Barkeret al.and a long range three-body (triple dipole and dipole-dipole-quadrupole) potential at 297 K and densities between 2 and 14 × 1027atoms/m3. We compare in real and Fourier space, and also calculate the pressure and compressibility. The latter two quantities are compared to experimental data on the 297 K isotherm, and while the PY results are in agreement the Barkeret al.potential results are significantly different for ρ > 3 × 1027atoms/m3.