FREZIER, Amédée-François (1682-1773). Traité des Feux d'Artifice pour le spectacle. Paris: Jacques Chardon for Nyon fils, 1747. 8° (197 x 125mm.). Half-title. Engraved folding frontispiece. Three engraved headpieces by Soubeyran, after Cochin, 13 engraved folding plates. (Some browning and marginal worming, H8-K7 repaired, plates I-VI, VIII-XIII with single wormhole just affecting plate area.) Modern half morocco. Provenance: Emile Farnes (signature). New edition. -- Friedrich Ludwig EHRMANN (1740-1800). Essai d'un art de Fusion à l'aide de l'air du feu, ou air vital. French translation by M. de Fontallard. Strassbourg and Paris: Jean Henri Heitz for Jean George Treuttel and Cuchet, 1787. 8° (198 x 120mm.). Three engraved folding plates. Contemporary French mottled calf, spine gilt (extremities scuffed, joints slightly split at the top of spine). FIRST EDITION of French translation of Ehrmann's essay, Versuch einer Schmelzkunst mit Beyhülfe der Zeyerluft (Strassbourg, 1785). Partington III, 461. (2)