The Wealth of Nations by Part 5 Chapter 2 Page 224

shillings, upon the produce of a quarter of malt.

Taking the whole kingdom at an average, therefore, the whole amount of the duties upon malt, beer, and ale cannot be estimated at less than twenty-four or twenty-five shillings upon the produce of a quarter of malt. But by taking off all the different duties upon beer and ale, and by tripling the malt-tax, or by raising it from six to eighteen shillings upon the quarter of malt, a greater revenue, it is said, might be raised by this single tax than what is at present drawn from all those heavier taxes.

Under the old malt tax, indeed, is comprehended a tax of four shillings upon the hogshead of cyder, and another of ten shillings upon the barrel of mum. In 1774, the tax upon cyder produced only L3083 6s.