purchase it. Though the current coin of the two countries, therefore, were equally near the standards of their respective mints, a sum of English money could not well purchase a sum of French money, containing an equal number of ounces of pure silver, nor consequently a bill upon France for such a sum. If for such a bill no more additional money was paid than what was sufficient to compensate the expense of the French coinage, the real exchange might be at par between the two countries, their debts and credits might mutually compensate one another, while the computed exchange was considerably in favour of France. If less than this was paid, the real exchange might be in favour of England, while the computed was in favour of France.
Thirdly, and lastly, in some places, as at Amsterdam, Hamburg, Venice, etc. foreign bills of exchange are paid in what they call bank money; while in others, as at London, Lisbon, Antwerp, Leghorn, etc. they are paid in the common currency of the country. What is called bank money is always of more value than the same nominal sum of common currency. A thousand guilders in the bank of Amsterdam, for example, are of more value than a thousand guilders of Amsterdam currency. The difference between them is called the agio of the bank, which, at Amsterdam, is generally about five percent. Supposing the current money of two countries equally near to the standard of their respective mints, and that the one pays foreign bills in this common currency, while the other pays them in bank money, it is evident that the computed exchange may be in favour of that which pays in bank money, though the real exchange should be in favour of that which pays in current money; for the same reason that the computed exchange may be in favour of that which pays in better money, or in money nearer to its own standard, though the real exchange should be in favour of that which pays in worse. The computed exchange, before the late reformation of the gold coin, was generally against London with Amsterdam, Hamburg, Venice, and, I believe, with all other places which pay in what is called bank money. It will by no means follow, however, that the real exchange was