Memoirs -- Euler (J.A.): Recherches dur la Resistance du Milieu dans lequel les Planetes Se Meuvent, Berlin, chez Chrêtien Fréderic Voss, 1762, 4to, 48pp., bound with 5 other 18th and 19th-century memoirs by De Moivre and others, 19th-century half moroccco; and 11 others vols. of mathematical memoirs, the majority 19th-century. (12)