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rage of summer and winter wages, which a given portion of them will command.
When we come to consider the varying value of commodities at distant periods in the same country, or the rise or fall of produce in the progress of cultivation and improvement, we are necessarily deprived of the test of an actual exchange. We know, however, that at different periods in the same country both the value of the precious metals, and the rate of profits and corn wages, may alter most essentially.
The effect of the varying value of the precious metals, when we have once obtained a measure of value, will be easily estimated. The most important point at present is, to consider the effects which must be produced upon the value of commodities in the progress of society, by the changes which necessarily take place in the profits of stock and the corn wages of labour.
On the supposition of high profits at an early period of society, and a considerable fall of them subsequently, how are we to measure and compare the value of commodities at these different periods? With regard to those which had continued to cost the same quantity of accumulated and immediate labour, we could not say that they were of the same value, un-
