Some deviations from these conclusions can be expected at the lowest saturations. Chemical effects, which have not been accounted for in the mechanical analysis, can and often do lead to the situation that dry and drained (nearly dry or room dry) samples have somewhat different properties (Bonner et al., 1997). These differences are larger than can be explained by mechanical analyses alone. [For example, see Figures 3(a) and 3(b). Take special note of the three lowest saturation values in these Figures.] We discuss this point at greater length in the Discussion section.