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Interpretation of experimental data (crosses) from Virnovsky et al. (1998) where average saturation (a) and inverse effective relative permeabilities in (b) and (c) and in (d) and (e) are plotted against . Straight lines are drawn through the data for each flow fraction F to find the intercept (marked with circle points) corresponding to saturations and relative permeability points corrected for end effects. The slopes of the lines provide values of Cs, Co, Cw at each fraction.