I The Force of Gravity -- II Fields of Force -- III The Potential -- IV The Divergence Theorem. -- V. Properties of Newtonian Potentials at Points of Free Space -- VI. Properties of Newtonian Potentials at Points Occupied by Masses -- VII. Potentials as Solutions of Laplaceโs Equation; Electrostatics -- VIII Harmonie Functions -- IX Electric Images; Greenโs Function -- X Sequences of Harmonie Functions -- XI Fundamental Existence Theorems. -- XII The Logarithmic Potential -- Bibliographical Notes

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