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 October, 1841, until the thirtieth day of June, 1842, inclusive, in conformity with the act of September, 1841 : also, the rates of duties imposed by the Tariff Law of 1832 : also, containing 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 doing business at the Custom House /