The author[49] of a Practical Treatise on Brewing, which has run through eleven editions, after having stated the various ingredients for brewing porter, observes, "that however much they may surprise, however pernicious or disagreeable they may appear, he has always found them requisite in the brewing of porter, and he thinks they must invariably be used by those who wish to continue the taste, flavour, and appearance of the beer.[50] And though several Acts of Parliament have been passed to prevent porter brewers from using many of them, yet the author can affirm, from experience, he could never produce the present flavoured porter without them.[51] The intoxicating qualities of porter are to be ascribed to the various drugs intermixed with it. It is evident some porter is more heady than other, and it arises from the greater or less quantity of stupifying ingredients. Malt, to produce intoxication, must be used in such large quantities as would very much diminish, if not totally exclude, the brewer's profit."
The practice of adulterating beer appears to be of early date. By an Act so long ago as Queen Anne, the brewers are prohibited from mixing _cocculus indicus_, or any unwholesome ingredients, in their beer, under severe penalties: but few instances of convictions under this act are to be met with in the public records for nearly a century. To shew that they have augmented in our own days, we shall exhibit an abstract from documents laid lately before Parliament.[52]
These will not only amply prove, that unwholesome ingredients are used by fraudulent brewers, and that very deleterious substances are also vended both to brewers and publicans for adulterating beer, but that the ingredients mixed up in the brewer's enchanting cauldron are placed above all competition, even with the potent charms of Macbeth's witches:
"Root of hemlock, digg'd i' the dark, + + + + + + + + + + For a charm of pow'rful trouble, Like a hell-broth boil and bubble; Double, double, toil and trouble, Fire burn, and cauldron bubble."
The fraud of imparting to porter and ale an intoxicating quality by narcotic substances, appears to have flourished during the period of the late French war; for, if we examine the importation lists of drugs, it will be noticed that the quantities of cocculus indicus imported in a given time prior to that period, will bear no comparison with the quantity imported in the same space of time during the war, although an additional duty was laid upon this commodity. Such has been the amount brought into this country in five years, that it far exceeds the quantity imported during twelve years anterior to the above epoch. The price of this drug has risen within these ten years from two shillings to seven shillings the pound.