beer-heading

To impart to porter this property of frothing when poured from one vessel into another, or to produce what is also termed a _cauliflower head_, the mixture called _beer-heading_, composed of common green vitriol (sulphate of iron,) alum, and salt, is added.

A Treatise on Adulterations of Food, and Culinary Poisons Exhibiting the Fraudulent Sophistications of Bread, Beer, Wine, Spiritous Liquors, Tea, Coffee, Cream, Confectionery, Vinegar, Mustard, Pepper, Cheese, Olive Oil, Pickles, and Other Articles Employed in Domestic Economy Friedrich Christian Accum 1803