The idea of the possibility and desirableness of a universal language, scientifically constituted; a common form of speech for all the nations of mankind; for the remedy of the confusion and the great evil of Babel, is not wholly new. The celebrated Leibnitz entertained it. It was, we believe, glanced at among the schemes of Lord Monboddo. Bishop Wilkins devoted years of labor to the accomplishment of the task, and thought he had accomplished it. He published the results of his labors in heavy volumes, which have remained, as useless lumber, on the shelves of the antiquarian, or of those who are curious in rare books. A young gentleman of this city, of a rare genius, by the name of Fairbank, who died by a tragical fate a few years since, labored assiduously to the same end. A society of learned men has recently been organized in Spain, with their headquarters at Barcelona, devoted to the same work. Numerous other attempts have probably been made. In all these attempts, projects, and labors, the design has never transcended the purpose of _Invention_. The effort has been simply to _contrive_ a new form of speech, and to persuade mankind to accept it;--a task herculean and hopeless in its magnitude and impracticability; but looking still in the direction of the supply of one of the greatest needs of human improvement. The existence of no less than two or three thousand different languages and idioms on the surface of the planet, in this age of railroad and steamship communication, presents, obviously, one of the most serious obstacles to that unification of humanity which so many concurrent indications tend, on the other hand, to prognosticate. Another and different outlook toward a unity of speech for the race comes up from a growing popular impression that all existing languages must be ultimately and somewhat rapidly smelted into one by the mere heat and attrition of our intense modern international intercourse. Each nationality is beginning to put forth its pretensions as the proper and probable matrix of the new agglomerate, or philological pudding-stone, which is vaguely expected to result. The English urge the commercial supremacy of their tongue; the French the colloquial and courtly character of theirs; the Germans the inherent energy and philosophical adaptation of the German; the Spanish the wide territorial distribution and the pompous euphony of that idiom; and so of the other nationalities.