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Cochineal Colouring

Boil fifteen grains of powdered cochineal in half a pint of water, with a piece of alum about the size of a nut, and half a tea-spoonful of cream of tartar. Let the ingredients boil very slowly for half an hour; strain the liquid, and bottle it closely. Keep it in a cool place. It will keep better if three or four lumps of sugar are boiled with it. Sufficient for nearly half a pint.