Green, Sap

A very fugitive pigment, prepared from the juice of buckthorn berries. The berries are allowed to ferment for a week or eight days in a wooden tub. The juice is then pre ed out, strained, a little alum added, and the whole evaporated to a proper consistence; it is next run into pigs’ bladders, and hung up in a dry situation to harden. An inferior article is made from the juice of black alder, and of evergreen privet. It is a common practice to add 3 ⁄ 4 pint of lime water and 1 ⁄ 2 oz. of gum Arabic to every pint of either of the above juices.