EULER, Leonhard (1707-1783). Briefe über verschiedene Gegenstände aus der Naturlehre, Leipzig: Verlage der Dyckschen Buchhandlung, 1792-94, 3 volumes, 8°, 9 folding engraved plates (some browning), contemporary blue boards with white paper labels (gilt shelf mark on spines which have library labels removed from foot). Provenance: Bibliothek E.R. Cesar (library stamp on titles); JCL (3)