The nett duties and drawbacks payable on importation and exportation of all sorts of merchandize, digested into an easy method. [electronic resource] : Designed for the use of merchants, &c. Each article being calculated to the utmost exactness, and ranged in alphabetical order; so that at one view, may be seen, the duties and drawbacks to be paid or received, upon import of export of any merchandize, with the respective rates. Likewise the duties to be paid upon the exportation of native commodities, and several foreign dying goods. As also, the bounties and drawbacks to be received upon the exportation of several British goods. Together with a list of such goods as are prohibited to be imported, or exported. By Thomas Langham.