Book IV: On Systems of Political Economy
Adam Smith

Chapter VI: On Treaties of Commerce




Some treaties of commerce, however, have been supposed advantageous upon principles very different from these; and a commercial country has sometimes granted a monopoly of this kind against itself to certain goods of a foreign nation, because it expected that in the whole commerce between them, it would annually sell more than it would buy, and that a balance in gold and silver would be annually returned to it. It is upon this principle that the treaty of commerce between England and Portugal, concluded in 1703 by Mr. Methuen, has been so much commended. The following is a literal translation of that treaty, which consists of three articles only.




That is to say, that her sacred royal majesty of Great Britain shall, in her own name, and that of her successors, be obliged, for ever hereafter, to admit the wines of the growth of Portugal into Britain; so that at no time, whether there shall be peace or war between the kingdoms of Britain and France, anything more shall be demanded for these wines by the name of custom or duty, or by whatsoever other title, directly or indirectly, whether they shall be imported into Great Britain in or hogsheads, or other casks, than what shall be demanded for the like quantity or measure of French wine, deducting or abating a third part of the custom or duty. But if at any time this deduction or abatement of customs, which is to be made as aforesaid, shall in any manner be attempted and prejudiced, it shall be just and lawful for his sacred royal majesty of Portugal, again to prohibit the woollen cloths, and the rest of the British woollen manufactures.


The most excellent lords the plenipotentiaries promise and take upon themselves, that their above named masters shall ratify this treaty; and within the space of two months the ratifications shall be exchanged.



Our merchants were some years ago out of humour with the crown of Portugal. Some privileges which had been granted them, not by treaty, but by the free grace of that crown, at the solicitation indeed, it is probable, and in return for much greater favours, defence and protection, from the crown of Great Britain had been either infringed or revoked. The people, therefore, usually most interested in celebrating the Portugal trade were then rather disposed to represent it as less advantageous than it had commonly been imagined. The far greater part, almost the whole, they pretended, of this annual importation of gold, was not on account of Great Britain, but of other European nations; the fruits and wines of Portugal annually imported into Great Britain nearly compensating the value of the British goods sent thither.

Let us suppose, however, that the whole was on account of Great Britain, and that it amounted to a still greater sum than Mr. Baretti seems to imagine; this trade would not, upon that account, be more advantageous than any other in which, for the same value sent out, we received an equal value of consumable goods in return.





The great annual importation of gold and silver is neither for the purpose of plate nor of coin, but of foreign trade. A round-about foreign trade of consumption can be carried on more advantageously by means of these metals than of almost any other goods. As they are the universal instruments of commerce, they are more readily received in return for all commodities than any other goods; and on account of their small bulk and great value, it costs less to transport them backward and forward from one place to another than almost any other sort of merchandise, and they lose less of their value by being so transported. Of all the commodities, therefore, which are bought in one foreign country, for no other purpose but to be sold or exchanged again for some other goods in another, there are none so convenient as gold and silver. In facilitating all the different round-about foreign trades of consumption which are carried on in Great Britain consists the principal advantage of the Portugal trade; and though it is not a capital advantage, it is no doubt a considerable one.

That any annual addition which, it can reasonably be supposed, is made either to the plate or to the coin of the kingdom, could require but a very small annual importation of gold and silver, seems evident enough; and though we had no direct trade with Portugal, this small quantity could always, somewhere or another, be very easily got.

Though the goldsmith's trade be very considerable in Great Britain, the far. greater part of the new plate which they annually sell is made from other old plate melted down; so that the addition annually made to the whole plate of the kingdom cannot be very great, and could require but a very small annual importation.

It is the same case with the coin. Nobody imagines, I believe, that even the greater part of the annual coinage, amounting, for ten years together, before the late reformation of the gold coin, to upwards of eight hundred thousand pounds a year in gold, was an annual addition to the money before current in the kingdom. In a country where the expense of the coinage is defrayed by the government, the value of the coin, even when it contains its full standard weight of gold and silver, can never be much greater than that of an equal quantity of those metals uncoined; because it requires only the trouble of going to the mint, and the delay perhaps of a few weeks, to procure for any quantity of uncoined gold and silver an equal quantity of those metals in coin. But, in every country, the greater part of the current coin is almost always more or less worn, or otherwise degenerated from its standard. In Great Britain it was, before the late reformation, a good deal so, the gold being more than two per cent and the silver more than eight per cent below its standard weight. But if forty-four guineas and a half, containing their full standard weight, a pound weight of gold, could purchase very little more than a pound weight could of uncoined gold, forty-four guineas and a half wanting a part of their weight could not purchase a pound weight, and something was to be added in order to make up the deficiency. The current price of gold bullion at market, therefore, instead of being the same with the mint price, or £46 14s. 6d., was then about £47 14s. and sometimes about £48. When the greater part of the coin, however, was in this degenerate condition, forty-four guineas and a half, fresh from the mint, would purchase no more goods in the market than any other ordinary guineas, because when they came into the coffers of the merchant, being confounded with other money, they could not afterwards be distinguished without more trouble than the difference was worth. Like other guineas they were worth no more than £46 14s. 6d. If thrown into the melting pot, however, they produced, without any sensible loss, a pound weight of standard gold, which could be sold at any time for between £47 14s. and £48 either of gold or silver, as fit for all the purposes of coin as that which had been melted down. There was an evident profit, therefore, in melting down new coined money, and it was done so instantaneously, that no precaution of government could prevent it. The operations of the mint were, upon this account, somewhat like the web of Penelope; the work that was done in the day was undone in the night. The mint was employed, not so much in making daily additions to the coin, as in replacing the very best part of it which was daily melted down.

Were the private people, who carry their gold and silver to the mint, to pay themselves for the coinage, it would add to the value of those metals in the same manner as the fashion does to that of plate. Coined gold and silver would be more valuable than uncoined. The seignorage, if it was not exorbitant, would add to the bullion the whole value of the duty; because, the government having everywhere the exclusive privilege of coining, no coin can come to market cheaper than they think proper to afford it. If the duty was exorbitant indeed, that is, if it was very much above the real value of the labour and expense requisite for coinage, false coiners, both at home and abroad, might be encouraged, by the great difference between the value of bullion and that of coin, to pour in so great a quantity of counterfeit money as might reduce the value of the government money. In France, however, though the seignorage is eight per cent, no sensible inconveniency of this kind is found to arise from it. The dangers to which a false coiner is everywhere exposed, if he lives in the country of which he counterfeits the coin, and to which his agents or correspondents are exposed if he lives in a foreign country, are by far too great to be incurred for the sake of a profit of six or seven per cent.

The seignorage in France raises the value of the coin higher than in proportion to the quantity of pure gold which it contains. Thus by the edict of January 1726, the mint price of fine gold of twenty-four carats was fixed at seven hundred and forty livres nine sous and one denier one-eleventh, the mark of eight Paris ounces. The gold coin of France, making an allowance for the remedy of the mint, contains twenty-one carats and three-fourths of fine gold, and two carats one fourth of alloy. The mark of standard gold, therefore, is worth no more than about six hundred and seventy-one livres ten deniers. But in France this mark of standard gold is coined into thirty Louis d'ors of twenty-four livres each, or into seven hundred and twenty livres. The coinage, therefore, increases the value of a mark of standard gold bullion, by the difference between six hundred and seventy-one livres ten deniers, and seven hundred and twenty livres; or by forty-eight livres nineteen sous and two deniers.

A seignorage will, in many cases, take away altogether, and will, in all cases, diminish the profit of melting down the new coin. This profit always arises from the difference between the quantity of bullion which the common currency ought to contain, and that which it actually does contain. If this difference is less than the seignorage, there will be loss instead of profit. If it is equal to the seignorage, there will neither be profit nor loss. If it is greater than the seignorage, there will indeed be some profit, but less than if there was no seignorage. If, before the late reformation of the gold coin, for example, there had been a seignorage of five per cent upon the coinage, there would have been a loss of three per cent upon the melting down of the gold coin. If the seignorage had been two per cent there would have been neither profit nor loss. If the seignorage had been one per cent there would have been a profit, but of one per cent only instead of two per cent. Wherever money is received by tale, therefore, and not by weight, a seignorage is the most effectual preventative of the melting down of the coin, and, for the same reason, of its exportation. It is the best and heaviest pieces that are commonly either melted down or exported; because it is upon such that the largest profits are made.

The law for encouragement of the coinage, by rendering it duty-free, was first enacted during the reign of Charles II for a limited time; and afterwards continued, by different prolongations, till 1769, when it was rendered perpetual. The Bank of England, in order to replenish their coffers with money, are frequently obliged to carry bullion to the mint; and it was more for their interest, they probably imagined, that the coinage should be at the expense of the government than at their own. It was probably out of complaisance to this great company that the government agreed to render this law perpetual. Should the custom of weighing gold, however, come to be disused, as it is very likely to be on account of its inconveniency; should the gold coin of England come to be received by tale, as it was before the late recoinage, this great company may, perhaps, find that they have upon this, as upon some other occasions, mistaken their own interest not a little.

Before the late recoinage, when the gold currency of England was two per cent below its standard weight, as there was no seignorage, it was two per cent below the value of that quantity of standard gold bullion which it ought to have contained. When this great company, therefore, bought gold bullion in order to have it coined, they were obliged to pay for it two per cent more than it was worth after coinage. But if there had been a seignorage of two per cent upon the coinage, the common gold currency, though two per cent below its standard weight, would notwithstanding have been equal in value to the quantity of standard gold which it ought to have contained; the value of the fashion compensating in this case the diminution of the weight. They would indeed have had the seignorage to pay, which being two per cent, their loss upon the whole transaction would have been two per cent exactly the same, but no greater than it actually was.

If the seignorage had been five per cent, and the gold currency only two per cent below its standard weight, the bank would in this case have gained three per cent upon the price of the bullion; but as they would have had a seignorage of five per cent to pay upon the coinage, their loss upon the whole transaction would, in the same manner, have been exactly two per cent.

If the seignorage had been only one per cent and the gold currency two per cent below its standard weight, the bank would in this case have lost only one per cent upon the price of the bullion; but as they would likewise have had a seignorage of one per cent to pay, their loss upon the whole transaction would have been exactly two per cent in the same manner as in all other cases.

If there was a reasonable seignorage, while at the same time the coin contained its full standard weight, as it has done very nearly since the last recoinage, whatever the bank might lose by the seignorage, they would gain upon the price of the bullion; and whatever they might gain upon the price of the bullion, they would lose by the seignorage. They would neither lose nor gain, therefore, upon the whole transaction, and they would in this, as in all the foregoing cases, be exactly in the same situation as if there was no seignorage.

When the tax upon a commodity is so moderate as not to encourage smuggling, the merchant who deals in it, though he advances, does not properly pay the tax, as he gets it back in the price of the commodity. The tax is finally paid by the last purchaser or consumer. But money is a commodity with regard to which every man is a merchant. Nobody buys it but in order to sell it again; and with regard to it there is in ordinary cases no last purchaser or consumer. When the tax upon coinage, therefore, is so moderate as not to encourage false coining, though everybody advances the tax, nobody finally pays it; because everybody gets it back in the advanced value of the coin.

A moderate seignorage, therefore, would not in any case augment the expense of the bank, or of any other private persons who carry their bullion to the mint in order to be coined, and the want of a moderate seignorage does not in any case diminish it. Whether there is or is not a seignorage, if the currency contains its full standard weight, the coinage costs nothing to anybody, and if it is short of that weight, the coinage must always cost the difference between the quantity of bullion which ought to be contained in it, and that which actually is contained in it.

The government, therefore, when it defrays the expense of coinage, not only incurs some small expense, but loses some small revenue which it might get by a proper duty; and neither the bank nor any other private persons are in the smallest degree benefited by this useless piece of public generosity.





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