The two principles being established, however, that wealth consisted in gold and silver, and that those metals could be brought into a country which had no mines only by the balance of trade, or by exporting to a greater value than it imported; it necessarily became the great object of political œconomy to diminish as much as possible the importation of foreign goods for home consumption, and to increase as much as possible the exportation of the produce of domestic industry. Its two great engines for enriching the country, therefore, were restraints upon importation, and encouragements to exportation.
The restraints upon importation were of two kinds.
First, Restraints upon the importation of such foreign goods for home consumption as could be produced at home, from whatever country they were imported.
Secondly, Restraints upon the importation of goods of almost all kinds from those particular countries with which the balance of trade was supposed to be disadvantageous.
Those different restraints consisted sometimes in high duties, and sometimes in absolute prohibitions.
Exportation was encouraged sometimes by drawbacks, sometimes by bounties, sometimes by advantageous treaties of commerce with foreign states, and sometimes by the establishment of colonies in distant countries.
Drawbacks were given upon two different occasions. When the home-manufactures were subject to any duty or excise, either the whole or a part of it was frequently drawn back upon their exportation; and when foreign goods liable to a duty were imported in order to be exported again, either the whole or a part of this duty was sometimes given back upon such exportation.