Tariff, or, Rates of duties payable on goods, wares and merchandise, imported into the United States of America : on and after the first day of January, 1840, until the thirtieth day of June, 1842, inclusive, in conformity with the Compromise Act : also, the rates of duties imposed by the Tariff Law of 1832, together with many important laws, circulars, and decisions of the Treasury Department, relating to commerce and the revenue, and much useful information to merchants, masters of vessels, and others /