Prony (Gaspard Claire Francois Marie Riche, Baron de): Instruction Élémentaire sur les Moyens de Calculer les Intervalles Musicaux, [Paris], Firmin Didot Frères, 1832, 8vo, letterpress tables (some spotting), contemporary tree calf (rubbed, spine worn) -- Vallée (L.-L.): Traité de la Science du Dessin, 2 vols., Paris, Bachelier, 1838, sm. folio, 56 engraved plates (some spotting), contemporary speckled calf (scuffed) -- Blaise (Adolphe Gustave): Oeuvres de Mathematiques, Paris, chez Gabriel-François Quillau, 1740, 8vo, 14 folding engraved plates (occasional light soiling), contemporary calf (rubbed); and 5 others in French and Latin on science and mathematics. (8)