Equal quantities of labour will, at distant times, be purchased more nearly with equal quantities of corn, the subsistence of the labourer, than with equal quantities of gold and silver, or, perhaps, of any other commodity. Equal quantities of corn, therefore, will, at distant times, be more nearly of the same real value, or enable the possessor to purchase or command more nearly the same quantity of the labour of other people. They will do this, I say, more nearly than equal quantities of almost any other commodity; for even equal quantities of corn will not do it exactly. The subsistence of the labourer, or the real price of labour, as I shall endeavour to shew hereafter, is very different upon different occasions; more liberal in a society advancing to opulence, than in one that is standing still, and in one that is standing still, than in one that is going backwards. Every other commodity, however, will, at any particular time, purchase a greater or smaller quantity of labour, in proportion to the quantity of subsistence which it can purchase at that time. A rent, therefore, reserved in corn, is liable only to the variations in the quantity of labour which a certain quantity of corn can purchase. But a rent reserved in any other commodity is liable, not only to the variations in the quantity of labour which any particular quantity of corn can purchase, but to the variations in the quantity of corn which can be purchased by any particular quantity of that commodity. Though the real value of a corn rent, it is to be observed, however, varies much less from century to century than that of a money rent, it varies much more from year to year. The money price of labour, as I shall endeavour to shew hereafter, does not fluctuate from year to year with the money price of corn, but seems to be everywhere accommodated, not to the temporary or occasional, but to the average or ordinary price of that necessary of life. The average or ordinary price of corn, again is regulated, as I shall likewise endeavour to shew hereafter, by the value of silver, by the richness or barrenness of the mines which supply the market with that metal, or by the quantity of labour which must be employed, and consequently of corn which must be consumed, in order to bring any particular quantity of silver from the mine to the market. But the value of silver, though it sometimes varies greatly from century to century, seldom varies much from year to year, but frequently continues the same, or very nearly the same, for half a century or a century together. The ordinary or average money price of corn, therefore, may, during so long a period, continue the same, or very nearly the same, too, and along with it the money price of labour, provided, at least, the society continues, in other respects, in the same, or nearly in the same, condition. In the mean time, the temporary and occasional price of corn may frequently be double one year of what it had been the year