World brain
World Encyclopedia (Lecture delivered at the Royal Institution of Great Britain, November 20th, 1936) -- The Brain Organization of the Modern World (Lecture delivered in America, October and November, 1937) -- The Idea of a Permanent World Encyclopedia (Contribution to the new Encyclopédic Française, August, 1937) -- Passage from a Speech to the Congrès Mondial de la Documentation Universelle, Paris, August 20th, 1937 -- The Informative Content of Education (Presidential Address to the Educational Science Section of the British Association for the Advancement of Science, September 12th, 1937) -- Appendix I. Ruffled Teachers (Sunday Chronicle, September 12th, 1937) -- Appendix II. Palestine in Proportion (Sunday Chronicle, October 3rd, 1937) -- Appendix III. The Fall in America 1937 (Collier's, January 28th, 1938) -- Appendix IV. Transatlantic Misunderstandings (Liberty, January 15th, 1938).