Principia philosophiae; Dissertatio de Methodo; De passiones animae

Amsterdam: Blaeu, 1685. Editio ultima. Good. Quarto (22 cm); Three works in one volume, each with separate title page and pagination. [6]; [36], 222, [2 blank]; [16], 248; [24], 92, [4] pages, including engraved portrait frontispiece. Title pages with Blaeu's armillary device. Woodcut illustrations in text, many of them full-page. Shoulder notes. Occasional reader's notes in margins contemporary hand, and occasional underlining. In contemporary polished vellum over boards, stamped in blind with arabesque cartouche on both boards. Hinges, cords, and linings exposed (pastedowns never pasted down).

Based on the Elzevir edition of 1678 ("the last edition"), The "Meditiations," which should complete the contents of Opera Philosophica, was published in a separate volume.