The Wealth of Nations by Part 5 Chapter 2 Page 179

coals from those parts of the country in which they abound to those in which they are wanted. But the legislature, instead of a bounty, has imposed a tax of three shillings and threepence a ton upon coal carried coastways, which upon most sorts of coal is more than sixty per cent of the original price at the coal-pit. Coals carried either by land or by inland navigation pay no duty. Where they are naturally cheap, they are consumed duty free: where they are naturally dear, they are loaded with a heavy duty.

Such taxes, though they raise the price of subsistence, and consequently the wages of labour, yet they afford a considerable revenue to government which it might not be easy to find in any other way. There may, therefore, be good reasons for continuing them. The bounty upon the exportation of corn, so far as it tends in