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PREFACE.

THE subject of the following Dissertation is
generally allowed to be one, both of high im-
portance and of great difficulty.

“ From no source,” says Mr. Ricardo, “do so
many errors, and so much difference of opinion
in the science of political economy proceed,
as from the vague ideas which are attached
to the word value.” And the same eminent
writer, in the preface to the third edition of the
Principles of Political Economy and Taxation,
emphatically terms it a difficult subject. “In
this edition,” says he, “I have endeavoured
to explain more fully than in the last, my
opinion on the difficult subject of Varug.”

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