KEYNES, John Maynard. A Treatise on Money, London, Macmillan, 1930, 2 vols., 8°, FIRST EDITION, original cloth (extremities rubbed) -- MALTHUS, Thomas Robert. A Treatise on the Principle of Population, London, John Murray, 1826, 2 vols., 8°, sixth edition (title to vol. I. slightly browned), original cloth-backed boards (spine of vol. I lacking) -- RUSSELL, Bertrand. The Analysis of Mind, London & New York, [1921], 8°, FIRST EDITION (light spotting and browning), original cloth (spine faded, covers stained); and 15 others on economics and philosophy. (20)