The debates of Congress have been of considerable interest. In the _Senate_ the resolutions on the subject of Non-intervention have been further discussed, but no vote has been taken upon them. On the 5th of April, Senator Mason of Va. spoke against any declaration upon the subject by the Government of the United States, upon the ground that it would be a violation of the policy of neutrality which the country has always adopted and would tend to involve us in the wars of Europe. On the 13th, Senator Bell spoke upon the subject--saying that he attached very little importance to the resolutions, inasmuch as in his judgment their adoption would have no effect upon European affairs. But the present state of Europe involved considerations of great importance in regard to the United States, and to these his speech was wholly devoted. He referred to the condition of the several countries of Europe, to show that absolute power has become more firmly established than ever, and he ascribed this fact to the fears inspired by the movements of Socialists and fanatical reformers. He thought there was great reason to believe that when the Absolute powers of Europe shall have firmly established their authority at home, they will turn their united arms against the United States, and gave at length his reasons for this apprehension. In any such contest he thought England would become the enemy instead of the ally of this country. Any new disturbance in Europe, he thought, would inevitably involve the United States, as opportunities would be constantly sought to bring them into the contest. The reception already give to Kossuth was as marked an insult to Austria and Russia as one nation could possibly give to another. From these various considerations, he urged the duty of immediately putting our national defenses in such a condition as should enable us to defy the hostility of the world. We ought at once to attend to our financial system, to establish an overland communication with the Pacific, to take measures to secure a revenue in case of war and the consequent stoppage of foreign trade, to allay all sectional strife, and to make very large additions to our military marine. He expressed deep regret that while the future seemed so full of danger, the whole attention of the country should be so absorbed in the strife of contending parties. ---- On the 6th of April, a petition was presented from Mr. Henry O'Reilley, asking the protection of the Government, by the establishment of military posts, for the establishment of a line of telegraph from the Mississippi to the Pacific. Detached posts of twenty men, at points twenty miles apart, would be quite sufficient. ---- A communication was also received from the Secretary of the Navy, in reply to a resolution of the Senate, stating that a reconnaissance of the Chinese Seas could be conducted by the American vessels already in the service, at small expense,