D'ALEMBERT, Jean le Rond (1717?-83). Melanges de Litterature, d'Histoire, et de Philosophie, Leyden: Freres Murray, 1783, 5 volumes, 12° (165 x 100mm.), new and enlarged edition, one folding letterpress table (small ink stain to margin of B12 of vol. II,a few gatherings slightly browned), contemporary vellum (slightly soiled), sprinkled edges -- Felice FONTANA (1730-1805). Opuscoli scientifici, Naples: La Nuova Societa' Letteraria e Tipografica, 1787, 8° (179 x 110mm.), bound with the same author's: Osservazioni sopra la Ruggine del Grano, Naples: La Nuova Societa' Letteraria e Tipografica, 1787, 8° (179 x 110mm.), one engraved folding plate (spotted), contemporary vellum. (6)