Bosi's method for solving Laplace's equation.
Conformal mapping is used to obtain an implicit solution for a slightly specialized version of a planar electrostatic mirror for which Bosi claims to have obtained an exact solution by means of a Taylor series in the ratio of two dimensions. It is shown that the intervention of logarithmic terms invalidates Bosi's series after the first-order term. Comparison of Bosi's series for cylindrical and spherical mirrors with the exact expansion for an analogous planar problem suggests that in these cases not even the first-order terms are valid.
Lee-Whiting
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Atomic Energy of Canada Limited, Chalk River Nuclear Laboratories, Chalk River, Ontario, Canada K0J 1J0.