BARROW (ISAAC): Lectiones Geometricae, London, typis Gulielmi Godbid, 1670, 4to, first edition, 12 folding engraved plates (? lacking 3ll. 'Addenda' at end), contemporary calf (upper cover lacking) [Wing B940] -- SLUSE (RENÉ FRANÇOIS DE): Mesolabum seu duae mediae proportionales inter extremas datas per circulum et per infinitas hyperbolas, Liège, apud Gulielmum Henricum Streel, 1668, second edition, woodcut diagrams, title with ownership inscription of Petrur Hanssen 1732 (occasional browning), contemporary floral boards (faded) [Sotheran I, 4419; Honeyman 2856] -- TORELLI (JOSEPH): De Nihilo Geometrico libri II, Verona, typis Augustini Carattonii, 1758, first edition, title with ownership inscription: 'Buzengeiger 1808', woodcut diagrams in text (accession no. on vero of title and at lower margin of B6r), contemporary boards (crudely-repaired) [Riccardi I (2), 538]; and 9 others in Latin. (12)