New memoirs establishing a true knowledge of mankind, by discovering the affections of the heart, and the operations of the understanding, In the various Scenes of Life: Being A Critical Inquiry into the Nature of Friendship and Happiness. And Essays on other Important Subjects. By the Marquis D'Argens, Lord of the Bed-Chamber to the King of Prussia, Director of his Royal Academy of Sciences, and Author of the Jewish Spy. Interspersed with letters from the Baron de Spon, the Emperor's Minister at Berlin; from a Member of the Royal Society at London, &c. And two novels, Spanish and French; Shewing the Tragical Effects of Jealousy; the dissembling Arts of Coquetry; and the unhappy State of the Comedian. With Thoughts on the art of beautifying the face. By Mademoiselle Cochois, The Favourite both of the Court, and the Theatre, of Berlin. In two volumes [electronic resource].