On September 25–27, 1962, the Advisory Committee on Thermometry of the International Committee on Weights and Measures met under the presidency of Professor J. de Boer of Amsterdam, in Se`vres (a suburb of Paris), in the Pavilion de Breteuil, the home of the International Bureau of Weights and Measures, and for three days discussed important matters relating to international standards of thermometry. The Advisory Committee on Thermometry is one of the working groups of the International Committee on Weights and Measures, a committee established in 1875 by the “Convention du Me`tre”, an international treaty between the principal industrial and scientific nations for obtaining international agreement on physical standards of measurement for science, technology, and industry.