LALANDE, Joseph-Jérôme Lefrançais de (1732-1807). Exposition du Calcul Astronomique, Paris: l'Imprimerie Royale, 1762, 8°, FIRST EDITION, 3 folding engraved plates; Abrégé d'Astronomie, Paris: chez Firmin Didot, 1795, 8°, 16 folding engraved plates (? lacking half title) -- Pierre Simon LAPLACE (1749-1827). The System of the World, translated from the French by J. Pond, London: for Richard Phillips, 1809, 2 volumes, 12° (vol. I: half title repaired with adhesive tape on verso, title and preliminaries affected by damp, some marginal soiling, vol. II: C10 cleanly torn, M1 to end with hole at lower margin rather crudely repaired with segments of linen, some browning of margins towards end, L5-8 detached), the three works all with library markings and in non-uniform library cloth. Provenance: I. London Institution (stamps on title); JCL (4)