Royal dissertations : I. On manners, customs, industry, and the progress of the human understanding in the arts and sciences. II. On superstition and religion. III. On the ancient and modern Government of Brandenburg. IV. On the reasons for the enacting and repealing of laws. With the character of the celebrated M. De Voltaire. By the present King of Prussia. (Translanted from the berlin copy.) To which is added, his description and character.