The Wealth of Nations by Part 2 Chapter 5 Page 28

operation, two distinct capitals; but one of them only is employed in supporting domestic industry.

The capital which sends British goods to Portugal, and brings back Portuguese goods to Great Britain, replaces by every such operation only one British capital. The other is a Portuguese one. Though the returns, therefore, of the foreign trade of consumption should be as quick as those of the home trade, the capital employed in it will give but one half the encouragement to the industry or productive labour of the country.

But the returns of the foreign trade of consumption are very seldom so quick as those of the home trade. The returns of the home trade generally come in before the end of the year, and sometimes three or four times in the year. The returns of the foreign trade of