JANIN, JEAN. Mémoires et Observations Anatomiques, Physiologiques et Physiques sur l'Oeil, et sur les Maladies qui affectent cet Organe. xl, 474, [6] pages, including initial blank and half-title, plus 8-page catalogue circa 1786 of the bookseller Théophile Barrois le jeune bound between half-title and title * BEER, GEORG JOSEPH. Pflege gesunder und geschwächter Augen. Engraved frontispiece. x, 197, [1] pages. Together, 2 volumes. 8vo, 195x126 mm, contemporary mottled sheep gilt, spine ends chipped, contents foxed at end; and small 8vo, 164x100, modern marbled boards, contents toned, opening leaves gnawed slightly along fore edge and in upper outer corner. Lyon & Paris, 1772 [i. e., circa 1786?]; Vienna & Leipzig, 1800