3. If all the dealer's capital is employed in his own trade, and no part of it locked up as unsold goods, the new demand affords him additional encouragement to save, by enabling his savings to yield him not merely interest, but profit; and if he does not choose to save (or until he shall have saved), it enables him to carry on an additional business with borrowed capital, and so gain the difference between interest and profit, or, in other words, to receive wages of superintendance on a larger amount of capital. This, it will be found, is a complete account of all the gains which a dealer in any commodity can derive from an accession to the number of those who deal with him: and it is evident to every one, that these advantages are real and important, and that they are the cause which induces a dealer of any kind to desire an increase of his business. It follows from these premises, that the arrival of a new unproductive consumer (living on his own means) in any place, be that place a village, a town, or an entire country, is beneficial to that place, if it causes to any of the dealers of the place any of the advantages above enumerated, without withdrawing an equal advantage of the same kind from any other dealer of the same place. This accordingly is the test by which we must try all such questions, and by which the propriety of the analogical argument, from dealing with a tradesman to dealing with a nation, must be decided. Let us take, for instance, as our example, Paris, which is much frequented by strangers from various parts of the world, who, as sojourners there, live unproductively upon their means. Let us consider whether the presence of these persons is beneficial, in an _industrial_ point of view, to Paris. We exclude from the consideration that portion of the strangers' incomes which they pay to natives as direct remuneration for service, or labour of any description. This is obviously beneficial to the country. An increase in the funds expended in employing labour, whether that labour be productive or unproductive, tends equally to raise wages. The condition of the whole labouring class is, so far, benefited. It is true that the labourers thus employed by sojourners are probably, in part or altogether, withdrawn from productive employment. But this is far from being an evil; for either the situation of the labouring classes is improved, which is far more than an equivalent for a diminution in mere production, or the rise of wages acts as a stimulus to population, and then the number of productive labourers becomes as great as before. To this we may add, that what the sojourners pay as wages of labour or service (whether constant or casual), though expended unproductively by the first possessor, may, when it passes into the hands of the receivers, be by them saved, and invested in a productive employment. If so, a direct addition is made to the national capital.