The Wealth of Nations by Part 4 Chapter 3 Page 23

standard money of the country, deducting only so much as was necessary for defraying the expense of coinage, and the other necessary expense of management. For the value which remained, after this small deduction was made, it gave a credit in its books. This credit was called bank money, which, as it represented money exactly according to the standard of the mint, was always of the same real value, and intrinsically worth more than current money. It was at the same time enacted, that all bills drawn upon or negotiated at Amsterdam of the value of six hundred guilders and upwards should be paid in bank money, which at once took away all uncertainty in the value of those bills.

Every merchant, in consequence of this regulation, was obliged to keep an account with the bank in order to pay his foreign bills of exchange, which