The Wealth of Nations by Part 5 Chapter 2 Page 121

Such reimpositions are always over and above the taille of the particular year in which they are laid on.

When a tax is imposed upon the profits of stock in a particular branch of trade, the traders are all careful to bring no more goods to market than what they can sell at a price sufficient to reimburse them for advancing the tax.

Some of them withdraw a part of their stocks from the trade, and the market is more sparingly supplied than before. The price of the goods rises, and the final payment of the tax falls upon the consumer. But when a tax is imposed upon the profits of stock employed in agriculture, it is not the interest of the farmers to withdraw any part of their stock from that employment. Each farmer occupies a certain quantity of land, for which hi pays rent.