As the tax is made payable in money, so the valuation of the land is expressed in money. Since the establishment of this valuation, the value of silver has been pretty uniform, and there has been no alteration in the standard of the coin, either as to weight or fineness. Had silver risen considerably in its value, as it seems to have done in the course of the two centuries which preceded the discovery of the mines of America, the constancy of the valuation might have proved very oppressive to the landlord. Had silver fallen considerably in its value, as it certainly did for about a century at least after the discovery of those mines, the same constancy of valuation would have reduced very much this branch of the revenue of the sovereign. Had any considerable alteration been made in the standard of the money, either by sinking the same quantity of silver to a lower denomination, or by raising it to a higher; had an ounce of silver, for example, instead of being coined into five shillings and two pence, been coined either into pieces which bore so low a denomination as two shillings and seven pence, or into pieces which bore so high a one as ten shillings and four pence, it would, in the one case, have hurt the revenue of the proprietor, in the other that of the sovereign.

In circumstances, therefore, somewhat different from those which have actually taken place, this constancy of valuation might have been a very great inconveniency, either to the contributors or to the commonwealth. In the course of ages, such circumstances, however, must at some time or other happen. But though empires, like all the other works of men, have all hitherto proved mortal, yet every empire aims at immortality. Every constitution, therefore, which it is meant should be as permanent as the empire itself, ought to be convenient, not in certain circumstances only, but in all circumstances; or ought to be suited, not to those circumstances which are transitory, occasional, or accidental, but to those which are necessary, and therefore always the same.

A tax upon the rent of land, which varies with every variation of the rent, or which rises and falls according to the improvement or neglect of cultivation, is recommended by that sect of men of letters in France, who call themselves the economists, as the most equitable of all taxes. All taxes, they pretend, fall ultimately upon the rent of land, and ought, therefore, to be imposed equally upon the fund which must finally pay them. That all taxes ought to fall as equally as possible upon the fund which must finally pay them, is certainly true. But without entering into the disagreeable discussion of the metaphysical arguments by which they support their very ingenious theory, it will sufficiently appear, from the following review, what are the taxes which fall finally upon the rent of the land, and what are those which fall finally upon some other fund.

In the Venetian territory, all the arable lands which are given in lease to farmers are taxed at a tenth of the rent.[53] The leases are recorded in a public register, which is kept by the officers of revenue in each province or district. When the proprietor cultivates his own lands, they are valued according to an equitable estimation, and he is allowed a deduction of one-fifth of the tax; so that for such land he pays only eight instead of ten per cent. of the supposed rent.

A land-tax of this kind is certainly more equal than the land-tax of England. It might not, perhaps, be altogether so certain, and the assessment of the tax might frequently occasion a good deal more trouble to the landlord. It might, too, be a good deal more expensive in the levying.

Such a system of administration, however, might, perhaps, be contrived, as would in a great measure both prevent this uncertainty, and moderate this expense.

The landlord and tenant, for example, might jointly be obliged to record their lease in a public register. Proper penalties might be enacted against concealing or misrepresenting any of the conditions; and if part of those penalties were to be paid to either of the two parties who informed against and convicted the other of such concealment or misrepresentation, it would effectually deter them from combining together in order to defraud the public revenue. All the conditions of the lease might be sufficiently known from such a record.

Some landlords, instead of raising the rent, take a fine for the renewal of the lease. This practice is, in most cases, the expedient of a spendthrift, who, for a sum of ready money sells a future revenue of much greater value. It is, in most cases, therefore, hurtful to the landlord; it is frequently hurtful to the tenant; and it is always hurtful to the community. It frequently takes from the tenant so great a part of his capital, and thereby diminishes so much his ability to cultivate the land, that he finds it more difficult to pay a small rent than it would otherwise have been to pay a great one. Whatever diminishes his ability to cultivate, necessarily keeps down, below what it would otherwise have been, the most important part of the revenue of the community. By rendering the tax upon such fines a good deal heavier than upon the ordinary rent, this hurtful practice might be discouraged, to the no small advantage of all the different parties concerned, of the landlord, of the tenant, of the sovereign, and of the whole community.

Some leases prescribe to the tenant a certain mode of cultivation, and a certain succession of crops, during the whole continuance of the lease. This condition, which is generally the effect of the landlord's conceit of his own superior knowledge (a conceit in most cases very ill-founded), ought always to be considered as an additional rent, as a rent in service, instead of a rent in money. In order to discourage the practice, which is generally a foolish one, this species of rent might be valued rather high, and consequently taxed somewhat higher than common money-rents.

Some landlords, instead of a rent in money, require a rent in kind, in corn, cattle, poultry, wine, oil, &c.; others, again, require a rent in service. Such rents are always more hurtful to the tenant than beneficial to the landlord. They either take more, or keep more out of the pocket of the former, than they put into that of the latter. In every country where they take place, the tenants are poor and beggarly, pretty much according to the degree in which they take place. By valuing, in the same manner, such rents rather high, and consequently taxing them somewhat higher than common money-rents, a practice which is hurtful to the whole community, might, perhaps, be sufficiently discouraged.