Delegates to the Madrid Meetings of the International Union of Geodesy and Geophysics in October, 1924, will cherish the memory of the deep blue skies, the crisp, invigorating October atmosphere, and, above all, the hearty and open‐handed hospitality of Spain. While especial mention should be made of Senors Cubello and Galbis of the Madrid committee for their efforts in our behalf, it was, after all, the Spanish nation, headed by their majesties the King and the Queen, and assisted by their ministers, that really gave to the meetings their setting of artistic beauty. It was refreshing as well as a relaxation to pass from the tenseness of a scientific conference to a reception in the Royal Palace, a concert in the Royal Theater, a banquetà la Madrid, or an excursion to a suburban restaurant, an art museum, a scientific observatory, or, for some of the delegates at least, even a bull fight. The memory of these various delights forms the artistic background for our mind's picture of the scientific conferences, which engaged our days in Madrid, and about which I am now to speak to you, confining myself to the meetings of the Meteorological Secti