OF VALUE.

209

Now this cannot be true if we can find any
instances of the following nature :
1. Cases in which two commodities have been
produced by an equal quantity of labour,
and yet sell for different quantities of money.
2. Cases in which two commodities, once equal
in value, have become unequal in value,
without any change in the quantity of labour
respectively employed in each*.
Cases of the first kind are exceedingly numerous.
 Every one at all acquainted with manufactures
 must know, that there are in the
same, as well as in different occupations, various
 degrees of skill and rapidity of execution

other things, but an increase or diminution of the quantity
of labour required for ite production : and the prices of all
things whatsoever represent the quantity of labour by which
they are severally produced; and the value of a is to the
value of 8 universally as the quantity of labour which produces
 a to the quantity of labour which produces B.”—
London Magazine, April 1824, p. 352.
* This last case is resolvable into the first, but the subject
 will be better illustrated by keeping them distinct.