In process of time, and as people became gradually more familiar with the use of the different metals in coin, and consequently better acquainted with the proportion between their respective values, it has in most countries, I believe, been found convenient to ascertain this proportion, and to declare by a public law that a guinea, for example, of such a weight and fineness, should exchange for one-and-twenty shillings, or be a legal tender for a debt of that amount. In this state of things, and during the continuance of any one regulated proportion of this kind, the distinction between the metal which is the standard, and that which is not the standard, becomes little more than a nominal distinction.

In consequence of any change, however, in this regulated proportion, this distinction becomes, or at least seems to become, something more than nominal again.