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There are, indeed, a few manufactures, in which the necessary

rise in the real price of the rude materials will more than

compensate all the advantages which improvement can introduce

into the execution of the work. In carpenters' and joiners' work,

and in the coarser sort of cabinet work, the necessary rise in

the real price of barren timber, in consequence of the

improvement of land, will more than compensate all the advantages

which can be derived from the best machinery, the greatest

dexterity, and the most proper division and distribution of work.

But in all cases in which the real price of the rude material

either does not rise at all, or does not rise very much, that of

the manufactured commodity sinks very considerably.