The Wealth of Nations by Part 1 Chapter 11 Page 270

of other goods, or, what is the same thing, the price of a greater quantity and variety of other goods to buy with. But it will generally be impossible to supply the great and extended market without employing a quantity of labour greater than in proportion to what had been requisite for supplying the narrow and confined one. A market which, from requiring only one thousand, comes to require annually ten thousand tons of fish, can seldom be supplied without employing more than ten times the quantity of labour which had before been sufficient to supply it. The fish must generally be fought for at a greater distance, larger vessels must be employed, and more expensive machinery of every kind made use of.

The real price of this commodity, therefore, naturally rises in the progress of improvement. It has accordingly done so,