Tariff, or rates of duty on goods, wares and merchandise imported into the United States of America : as established by a bill reducing the duty on imports, and for other purposes, passed July 30th, 1846, to take effect from and after the first day of December, 1846 : together with the warehousing bill, and the several regulations and decisions of the Treasury Department in relation thereto, and other information highly useful to merchants, masters of vessels, etc. /