Wolff, Christian von Reasonable thoughts on the powers of the human mind and their proper use in the discovery of truth. With an engraved frontispiece and a two-colour title page. Halle, Generische Buchhandlung, 1740. 12 vols. 233 p., 6 vols. Cl.-8°. Softcover with gilt stamped label and gilt lettering (rubbed and bumped). 10th enlarged edition. - With a dedication by Dr Leo Stern on the flyleaf. - Numerous annotations and notes in ink. - Work by the German philosopher Christian von Wolff, an important thinker of the Enlightenment. - Endpapers renewed. - Margins minimally browned, slightly stained. Overall in good condition. With an engraved frontispiece and a two-colour title page. Leather with gilt stamped label and gilt lettering (rubbed and bumped). - 10th enlarged edition. - With a dedication by Dr Leo Stern on the endpaper. - Numerous annotations and notes in ink - Work of the German philosopher Christian von Wolff, an important thinker of the Enlightenment. - Endpapers renewed. - Margins minimally browned, slightly stained. Overall in good condition.