ON Saturday last, May 9, the British Empire Exhibition at Wembley was reopened by the King amid scenes of much popular enthusiasm. The King was accompanied by the Queen and was received by the Duke of York, who is president this year of the Exhibition. In his address inviting the King to open the Exhibition, the Duke of York emphasised the many benefits which have resulted from last year's display and stated that, while the Exhibition of 1925 “has integrally the same purpose as in 1924- to show how great are the resources available within the Empire... it will present its lessons of Empire in a new manner.” In a happy phrase, he referred to the Exhibition as the “University of Empire.” The King congratulated the president, the board of management, and the executive council of the, Exhibition on the results of last year's work, and again the educational side was brought out when the King, speaking of the importance of goodwill between the peoples of the British Empire, declared that “the one sure foundation for that goodwill is a full knowledge of our mutual aspirations, capacities, and needs. To seek knowledge, more knowledge, and again more knowledge, of the great heritage which has been entrusted to us is the soundest Imperial policy.” As last year, the opening ceremony in the Stadium was broadcast from all the stations of the British Broadcasting Company. The general features of the Exhibition will be familiar to most readers of NATURE, and we hope in future issues to deal in detail with specific scientific aspects such as the display illustrating physical and biological science arranged by the Royal Society, the pure chemistry section which the Association of British Manufacturers has organised, and so on.