Figure 8.

Comparison of (two dimensional) calculations using orthogonal configuration with h/a = 1, for homogeneous anisotropic and layered models. Raw resistances are shown in (a), with the abscissa either k for anisotropic models, or the layer contrast σ₂/σ₁ for layered models. Resistances are normalized with respect to the model radial resistivity in graph (b) and the abscissa for isotropic layered models is rescaled to be k. Layer thicknesses are equal to h/n in each case except where indicated by an asterisk (*) where the central layer has twice the thicknesses of the outer two layers.