When the price of cattle, for example, rises so high that it is as profitable to cultivate land in order to raise food for them as in order to raise food for man, it cannot well go higher.

If it did, more corn land would soon be turned into pasture. The extension of tillage, by diminishing the quantity of wild pasture, diminishes the quantity of butcher’s meat which the country naturally produces without labour or cultivation, and by increasing the number of those who have either corn, or, what comes to the same thing, the price of corn, to give in exchange for it, increases the demand. The price of butcher’s meat, therefore, and consequently of cattle, must gradually rise till it gets so high that it becomes as profitable to employ the most fertile and best cultivated lands in raising food for them as in