4 works. 1. Rivard, D.-F. - Abstract of the sphere,... Lot 1033

4 works. 1. Rivard, D.-F. - Abstract of the sphere, and of the calendar, for the use of those who do not scaveng geometry. Paris, Lottin/Desaint et Saillant, 1743. 12mo: xii-130-[4]-83 pp.; 2 pl. (a few pencil notes). Contemp. leather. - 2. Dantal, P.- Perpetual and historical calendar based on the principles of the most famous astronomers, such as Messrs. Copernicus, Galileo, Clavius, Cassini, Newton, Lahire, Lalande, etc. Paris, A. Delalain, 1810. 8vo: xii-368 pp., 1 pl. Contemp. half calf, marbled paper covers (part of spine missing). - Chrysologue de Gy, P.- Abrégé d'astronomie pour l'usage des planisphères dedicated and presented to the King. Paris, Mérigot l'aîné, 1778. 8vo: [4]-148 pp. ("Additions", 4 pp. bound before last p.). Paper binding (us.). - La Caille, N.-L. de- Leçons élémentaires d'astronomie géométrique et physique. Paris, H.-L. Guérin; L.-F. Delatour, 1761. 8vo: vi-[2]-415 pp., 9 pl. Contemp. full mottled calf, spine with 5 raised bands (weak joints, corners bumped).