2. It gives claim to the return of equivalent wealth at any Time. In this second use, currency is the exponent of accumulation: it renders the laying up of store at the command of individuals unlimitedly possible;--whereas, but for its intervention, all gathering would be confined within certain limits by the bulk of poverty, or by its decay, or the difficulty of its guardianship. "I will pull down my barns and build greater" cannot be a daily saying; and all material investment is enlargement of care. The national currency transfers the guardianship of the store to many; and preserves to the original producer the right of re-entering on its possession at any future period.
3. It gives claim (practical, though not legal) to the return of equivalent wealth in any Kind. It is a transferable right, not merely to this or that, but to anything; and its power in this function is proportioned to the range of choice. If you give a child an apple or a toy, you give him a determinate pleasure, but if you give him a penny, an indeterminate one, proportioned to the range of selection offered by the shops in the village. The power of the world's currency is similarly in proportion to the openness of the world's fair, and commonly enhanced by the brilliancy of external aspect, rather than solidity of its wares.
We have said that the currency consists of orders for equivalent goods. If equivalent, their quality must be guaranteed. The kinds of goods chosen for specific claim must, therefore, be capable of test, while, also, that a store may be kept in hand to meet the call of the currency, smallness of bulk, with great relative value, is desirable; and indestructibility, over at least a certain period, essential.
Such indestructibility and facility of being tested are united in gold; its intrinsic value is great, and its imaginary value is greater; so that, partly through indolence, partly through necessity and want of organization, most nations have agreed to take gold for the only basis of their currencies;--with this grave disadvantage, that its portability enabling the metal to become an active part of the medium of exchange, the stream of the currency itself becomes opaque with gold--half currency and half commodity, in unison of functions which partly neutralize, partly enhance each other's force.