CONTENTS Elliptic Montion. Expansion is Elliptic Mantion. Gravitional Attraction between Bodies of Fenite Dimensions. Calculus of Finete Differences. Numerical Integration of Orbits. Aberrtion. Comparison of Observation of Orbits. General Integrals; Equilibrium Solutions. Variation of Arbitrary Constans. lunar Theory. Perturbations of the coodinates Hansen~s Methode. the disturbing Function.…