In Congress, during the past month, there has been copious discussion of a great variety of subjects, but no important action upon any. The influence of the approaching Presidential election makes itself felt upon the debates of Congress, coloring every speech and often superseding every other subject. Memorials have been presented in favor of authorizing another Arctic expedition in search of Sir John Franklin, for which Mr. Henry Grinnell again tenders the use of his ships--asking only that the government will send a small steamer with them and men for officers and sailors. Commander Wilkes has also addressed Congress on the subject; proposing a very large Expedition--sufficient indeed to establish a permanent settlement in the Arctic regions, from which the search may be prosecuted. Nothing has been done with regard to either.----Governor Kossuth has addressed to Congress a letter of thanks for the reception given him, which was presented in the Senate on the 17th of February, and gave rise to a long debate on the proposition to print it: it was ordered to be printed by 21 votes to 20 against it.----In the Senate a bill has been reported by Commitee to establish a branch mint in the city of New York, on condition that the city donate land for a site and the State exempt it from taxation.----A good deal of the attention of the Senate has been devoted to a debate upon the Public Land policy of the country, the question coming up on a bill granting large tracts of land to Iowa to aid in the construction of certain railroads. Mr. Sumner, of Massachusetts, spoke in favor of ceding all the public lands to the States in which they lie, mainly on the ground that the exemption of those lands from State taxation had created in those States an equitable title to them. On the 24th of February Mr. Geyer, of Missouri, spoke in favor of the same policy, basing his argument in its support upon the same facts. Mr. Underwood offered an amendment to the effect of distributing among the seventeen States in which there are no public lands, fifteen millions of acres. He spoke in defense of it at length. No vote has been taken upon the subject.----Further debate has been had upon the resolutions on the subject of non-intervention. On the 26th of February, Mr. Miller, of New Jersey, spoke against the policy of intermeddling at all in the affairs of foreign nations. He represented intervention in foreigns affairs as the habitual policy of European monarchies, which Washington had resisted; and he urged the duty and necessity of adhering strictly to the ground of neutrality which was adopted during the early history of this country. The subject was then postponed until the 9th of March, when Mr. Seward of New York, spoke upon it. He urged the absolute independence of every State, and the duty of all States to recognize and respect it. He entered upon a historical review of the connection of Hungary and Austria to show that Hungary was fully entitled to this