Table of contents : Electrostatics....Pages 1-10 Poisson's equation....Pages 11-16 Fundamental solutions....Pages 17-25 Capacity....Pages 26-33 Energy....Pages 34-40 Existence of the equilibrium distribution....Pages 41-49 Maximum principle for potentials....Pages 50-55 Uniqueness of the equilibrium distribution....Pages 56-59 The cone condition....Pages 60-65 Singularities of bounded harmonic functions....Pages 66-73 Green's function....Pages 74-83 The kelvin transform....Pages 84-90 Perron's method....Pages 91-99 Barriers....Pages 100-107 Kellogg's theorem....Pages 108-113 The riesz decomposition theorem....Pages 114-128 Applications of the riesz decomposition....Pages 129-137 Wiener's criterion....Pages 138-157