Scientific papers: Presented to max born (on his retirement from the tait chair of natural philosophy in the University of Edinburgh): Contributors: Sir Edward Appleton, David Bohm, Louis de Broglie, Richard Courant, Albert Einstein, Pascual Jordan, Th. V. Kármán and S. S. Penner, Alfred Landé, Erwin Schrödinger, Hermann Weyl. 94 pages, portrait, 15 × 23 cm. New York, Hafner Publishing Company, [1953]. Price, $2.50.