OFFICERS OF THE CUSTOMS.

The principal officer employed in the collection of the duties on imports nd tonnage, is the Collector, to whom the Naval Officer is at once an aid and a check The Surveyor superintends and directs the inferior fficers of the customs, and all three are appointed by the President and Senate. They formerly held their offices for an indefinite period; but, by an act of 15th May, 1820, their appointment is now limited to four years Weighers, Gaugers Measurers and Inspectors, are appointed by the Collector, with the approbation of the principal officer of the Treasury Department. For the duties of these several officers, see the act of Congress, of the 2d of March 1799. Public Appraisers are authorized by Jau act of the 20th of April, 1818. Their business is to appraise imported goods subject to duty ad valorem, when they are suspected to have been invoiced below the true value. They are appointed by the President and Senate, and hold commissions during the pleasure of the President. Assistant Appraisers are authorized by the act of May 28, 1830. COLLECTORS OF THE CUSTOMS.