schools, and academies of science, and coming from 110 parts of the globe, extending as far as India and Japan. It may be stated without exaggeration that the programme of the Delegation found an enthusiastic response in all parts of the world and from people of nearly every occupation and profession, many persons and societies expressing themselves in favour of the introduction of an international auxiliary language on the condition that it should not be one of the living languages. During the seven years of its existence the Delegation has carried out the duties entrusted to it in an exemplary manner, and has performed a gigantic amount of work. In May, 1907, the Delegation considered the time had come to lay the matter before the International Association of Academies. At that time the report was very wide-spread that the Association had altogether refused to consider the matter. In reality the Vienna Academy, as President of that year, decided to bring the question before the Association, but the latter declined to take the matter up (twelve votes to eight, one member not voting). At this point the Delegation had the right and the duty to speak out. It obtained an expression of opinion from the representatives of all the associated societies and clubs. The result of this was the formation of a working committee, consisting of sixteen members, almost entirely scholars and men of science of reputation and members of the different scientific academies. With the representatives of natural science and mathematics were associated philologists and linguists. The committee began to sit on October 15th, 1907, and, after eighteen sittings held in the Collège de France, arrived at a decision. Before we enter into this matter more fully it will be desirable to give a brief sketch of the historical development of artificial language. Anyone desiring to go more deeply into the history of this question (already three hundred years old) and the practical attempts at its realisation may be referred to the masterly work of L. Couturat and L. Leau, _Histoire de la Langue Universelle_ (Paris, 1903). In what follows only a few of the most important points will be mentioned.