The President says he shall endeavor to exercise the appointing power so as to elevate the standard of official employment and advance the prosperity and happiness of the people. No unfavorable change has taken place in our foreign relations. A convention has recently been negotiated with Great Britain to facilitate and protect the construction of a ship canal between the Atlantic and Pacific oceans: further provisions are required which shall designate and establish a free port at each end of the canal, and fix the distance from the shore within which belligerent maritime operations shall not be carried on. Upon these points there is said to be little doubt that the two nations will come to an understanding. The company of American citizens who have acquired from the state of Nicaragua the right of constructing a ship canal between the two oceans, through the territory of that state, have made progress in their preliminary arrangements. It is hoped that the guarantees of the treaty between the United States and Great Britain will be sufficient to secure the early completion of the work. Citizens of the United States have undertaken the construction of a railroad across the Isthmus of Tehuantepec, under grants of the Mexican government to a citizen of that republic. Some further stipulations from Mexico are still needed, however, to impart a feeling of security to those who may embark in the enterprise. Negotiations to secure them are now in progress. A proposition made by the government of Portugal to adjust and settle the claims of the United States against that government, has been accepted by the United States; and it is expected that a regular convention will be immediately negotiated for carrying the agreement into effect. The commissioner appointed under an act of Congress to carry into effect the Convention with Brazil, of January 27, 1849, has entered upon the performance of his duties: an extension of time, however, will be required, in consequence of the failure to receive documents which the government of Brazil is to furnish. The collection in ports of the United States, of discriminating duties on the vessels of Chili has been suspended.