Page:A Journey to the Western Islands of Scotland - Johnson (1775).djvu/379

 the same, and so measures an unknown quantity by an uncertain standard. It is competent enough when the markets of the same country, at different times, and those times not too distant, are to be compared; but of very little use for the purpose of making one nation acquainted with the state of another. Provisions, though plentiful, are sold in places of great pecuniary opulence for nominal prices, to which, however scarce, where gold and silver are yet scarcer, they can never be raised.

In the there is so little internal commerce, that hardly any thing has a known or settled rate. The price of things brought in, or carried out, is to be considered as that of a foreign market; and even this there is some difficulty in discovering, because their denominations of quantity are different from ours; and when there is ignorance on both sides, no appeal can be made to a common measure.