The Wealth of Nations by Part 4 Chapter 5 Page 7

This gradual fall in the average price of grain, it is probable, therefore, is ultimately owing neither to the one regulation nor to the other. but to that gradual and insensible rise in the real value of silver, which, in the first book in this discourse, I have endeavoured to show has taken place in the general market of Europe during the course of the present century. It seems to be altogether impossible that the bounty could ever contribute to lower the price of grain.

In years of plenty, it has already been observed, the bounty, by occasioning an extraordinary exportation, necessarily keeps up the price of corn in the home market above what it would naturally fall to. To do so was the avowed purpose of the institution. In years of scarcity, though the bounty is frequently suspended, yet the great exportation which it