[ENCYCLOPEDIA]. DIDEROT (Denis) & ALEMBERT (Jean LE ROND d'). Encyclopédie ou Dictionnaire raisonné des sciences, des arts et des métiers. Geneva, Pellet, 1777-1779. 39 volumes in-4° (including 3 vols. of plates), calf, spine ribbed and decorated (period binding). 501 engraved plates, including a frontispiece, and four large folded tables. Binding damage, especially on volume XIV with wetness; 3rd volume of plates lacking as well as the portrait. ATTACHED: Encyclopedina ou Dictionnaire encyclopédique des Ana. A Paris, Chez Panckoucke, 1791. In-4°, basane, spine ribbed (period binding). Damage to binding. TOGETHER 40 VOLUMES.