In the distribution of employments amongst all countries, the capital of poorer nations will be naturally employed in those pursuits, wherein a great quantity of labour is supported at home, because in such countries the food and necessaries for an increasing population can be most easily procured. In rich countries, on the contrary, where food is dear, capital will naturally flow, when trade is free, into those occupations, wherein the least quantity of labour is required to be maintained at home: such as the carrying trade, the distant foreign trade, where profits are in proportion to the capital, and not in proportion to the quantity of labour employed.[44] Although I admit, that from the nature of rent, a given capital employed in agriculture, on any but the land last cultivated, puts in motion a greater quantity of labour than an equal capital employed in manufactures and trade, yet I cannot admit that there is any difference in the quantity of labour employed by a capital engaged in the home trade, and an equal capital engaged in the foreign trade. "The capital which sends Scots manufactures to London, and brings back English corn and manufactures to Edinburgh," says Adam Smith, "necessarily replaces, by every such operation, two British capitals which had both been employed in the agriculture or manufactures of Great Britain. "The capital employed in purchasing foreign goods for home consumption, when this purchase is made with the produce of domestic industry, replaces too, by every such 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 the home trade, the capital employed in it will give but one half the encouragement to the industry or productive labour of the country."