Then from states m=10 to 14, the Lennard-Jones interactions were at full strength while the solute-solvent electrostatic interactions were gradually turned on. The change in free energy in going from m=0 (non-interacting) to m=14 (fully interacting) corresponds to the solvation-free energy. We term the Lennard-Jones contribution the change in going from m=0 to m=10 (full Lennard-Jones interactions and no electrostatic interactions). And the change in going from m=10 to m=14 we term the electrostatic contribution.