For lack of stability those measurements do vary from time to time with confusing effect. To compare them with measuring rods for length, breadth and thickness, it is as if yards, feet and inches were constantly contracting and expanding with reference not only to the magnitude of measurable objects but also to one another. Precisely in that way does Money in fact fluctuate. It always has, and unless scientifically standardized, it always will.
Nevertheless, whatever the fluctuations and local discrepancies of Money may be, it everywhere talks, when its language is translated, to the same general Economic effect at any given time. Stabilized, as it might be, it would talk to the same general Economic effect everywhere and all the time.
What language is to thought, Money terms are to trade. The trading transactions of the whole world are effected by means of Money standards and in the language of universally interpretable Money terms.
Conventionally defined, Money consists of coins minted by governments from precious metals more or less alloyed. Those forms are supplemented, however, with subsidiary forms commonly known as “currency.”
There is an Economic theory that metal coins alone are Money, paper currency being but promissory notes redeemable in coin. This theory is useful for testing Money media by coinage standards. But with reference to nearly if not all purposes of current trade, the intrinsic value of the Money piece is of slight Economic importance, or would be if Money were stabilized.
What counts in Economic measurements is Money denominations—Money language rather than Money pieces. For in the world-wide processes of trade, only a slight proportion of either metal coin or paper currency passes from hand to hand. Nearly all Money measurements are entered in books of account; and in these the debits and the credits so nearly offset one another, by and large, that the difference as a whole is too slight for consideration in passing down from the Money surface of Economics to the basic facts. A common and impressive exemplification is afforded by clearinghouse statistics. These show that the enormous banking transactions in Money terms which merge at the clearings daily, are balanced off with a trifling percentage of tangible Money.
Let the fact be emphasized then, that in defining Money as the medium of trade, Money terms rather than Money forms are to be understood as the trading medium.
When a customer at a retail store buys a supply of groceries, his payment may be made in Money pieces, either metal or paper. Yet it may be made instead with a check drawn against his bank balance, or through a charge to his account in the retailer’s books. If paid in Money pieces, either at the time of purchase or later, some if not all of those pieces will go to the storekeeper’s bank and be credited to him in Money terms on the books of the bank. If the payment be made by check, the amount of the check will be entered in the storekeeper’s bank account as if it were a payment in Money pieces instead of Money terms. Be such transactions as they may, however,—cash payments or check payments or drafts or promissory notes—tangible Money plays on the whole but a small part.
From purchases by customers at retail stores back to wholesalers; back of wholesalers to manufacturers of finished products and of unfinished products and of tools and of every other kind of merchantable object; back to land-owners for the sources of supply and the sites for production and delivery; back to farmers, to miners, to transportation agencies, to a vast though scattered army of wage-workers; through many a complicated series of accounts at stores, factories, mines, real-estate offices, railway and steamship offices, banks, clearinghouses—must we wend our way if we would investigate the processes of trade in detail. Yet only in slight degree do those processes involve the use of Money forms. Though coinage standards play their part, almost all trading transactions are made in Money terms and not with Money pieces.
In the process, then, of making a living, mankind trades commodities in terms of Money rather than in its forms, doing so principally through financial accounts. Peering into the details of those accounts (as professional accountants and other business specialists must often do when examining the particulars of their respective specialties), however useful this may be within the limits of the specialization, is always futile and often confusing or misleading for purposes of Economic study or investigation as a whole. In Economics the purpose is not to understand the technical details of business specialties simply. It is chiefly to relate those details to one another by determining their respective Economic categories so that the whole subject may be reasoned about comprehensively.