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When the quantity brought to market is just sufficient to supply

the effectual demand, and no more, the market price naturally

comes to be either exactly, or as nearly as can be judged of, the

same with the natural price. The whole quantity upon hand can be

disposed of for this price, and can not be disposed of for more.

The competition of the different dealers obliges them all to

accept of this price, but does not oblige them to accept of less.

The quantity of every commodity brought to market naturally suits

itself to the effectual demand. It is the interest of all those

who employ their land, labour, or stock, in bringing any

commodity to market, that the quantity never should exceed the

effectual demand; and it is the interest of all other people that

it never should fall short of that demand.