ALEMBERT (D'). Recherches sur différens points importans du systême du monde. Paris: David l'aîné, 1754-1756. -3 volumes in-4, marbled calf, ornate ribbed spine, red edges (period binding). "Uncommon first edition, complete in three parts published between 1754 and 1756, of this study by the famous philosopher and mathematician Jean Le Rond d'Alembert. Includes: I. Theory of the Moon. - II. Recherche de l'orbite des Planetes principales dans le systême de l'Attraction. - Nouvelles recherches sur la Précession des Equinoxes, & sur la Figure de la Terre & de la Lune. - III. New Observations on the Tables of the Moon. - New Remarks on the Orbit of the Earth. - Nouvelles Recherches Astronimiques & Physiques sur la figure de la Terre. The edition is illustrated with 8 folding plates of mathematical figures. Joints cracked, title and tomaison missing, corners dulled, wear rubbed. Some scattered foxing. Provenance: signature "J. Tisserand" on verso of endpapers. - Label and stamp of the Librairie Scientifique Ancienne et Moderne Ambroise Lefèvre."