If the fact be, that by allowing to foreigners a participation in our machinery, we enable them to produce any of our leading articles of export, at a lower money price than we can sell those articles, it is certain that unless we possess as great an advantage in the production of the machinery itself as we have in the production of other articles by means of machinery, the permitting of its exportation would alter to our disadvantage the division of the benefit of trade. Our exports being diminished, we should have to pay a balance in money. This would raise, in foreign countries, the price of everything which we import from thence: while our incomes, being reduced in money value, would render us less able to buy those articles even if they had not risen. The equilibrium of exports and imports would only be restored, when either some of the latter became so dear that we could produce them cheaper at home, or some articles not previously exported became exportable from the fall of prices. In the one case, we lose the benefit of importation altogether, and are obliged to produce at home, at a greater cost. In the other case, we continue to import, but pay dearer for our imports. Notwithstanding what has now been observed, restrictions on the exportation of machinery are not, in our opinion, justifiable, either on the score of international morality or of sound policy. It is evidently the common interest of all nations that each of them should abstain from every measure by which the aggregate wealth of the commercial world would be diminished, although of this smaller sum total it might thereby be enabled to attract to itself a larger share. And the time will certainly come when nations in general will feel the importance of this rule, and will so direct their approbation and disapprobation as to enforce observance of it. Moreover, a country possessing machines should consider that if a similar advantage were extended to other countries, they would employ it above all in the production of those articles, in which they had already the greatest natural advantages; and if the former country would be a loser by their improvements in the production of articles which it sells, it would gain by their improvements in those which it buys. The exportation of machinery may, however, be a proper subject for adjustment with other nations, on the principle of reciprocity. Until, by the common consent of nations, all restrictions upon trade are done away, a nation cannot be required to abolish those from which she derives a real advantage, without stipulating for an equivalent.