Professor Morse has submitted his telegraphic plan to the severe scrutiny of European criticism; and the Academy of Sciences, of Paris, the highest scientific tribunal in the world, hailed it with enthusiasm and approbation, when its operation was exhibited, and its principles explained by their distinguished perpetual secretary, M. Arago. It appears, from documents produced by Professor Morse, that the thanks of several learned bodies in France were voted to him for his invention, and the large medal of honor was awarded to him by the Academy of Industry. It further appears, that several other systems of telegraphs on the electric plan (among which were Wheatstone’s, of London, Steinheil’s, of Munich, and Masson’s, of Caen) had been submitted at various times for the consideration of the French Government, who appointed a commission to examine and report on them all, at the head of which commission was placed the administrator-in-chief of the telegraphs of France, (M. Foy,) who, to a note to Professor Morse, thus writes: “I take a true pleasure in confirming to you in writing that which I have already had the honor to say to you viva voce—that I have prominently presented to Monsieur the Minister of the Interior your electro magnetic telegraph, as being the system which presents the best chance of a practical application; and I have declared to him that, if some trials are to be made with electric telegraphs, I do not hesitate to recommend that they should be made with your apparatus.” Your committee, in producing further evidence of the approbation by the scientific world of the system of Professor Morse, would cite the letter of Professor Henry, of Princeton College, well known for his eminent attainments in electrical science, (marked 11,) in the appendix of this report. More recently, a committee, consisting of some of our most distinguished scientific citizens, was appointed by the American Institute of New York, to examine and report upon this telegraph, who made the report (12) in the appendix. In compliance with the recommendation of this report, the Institute awarded to Professor Morse the gold medal.