Proper birdlime is made from the inner bark of the holly, wflich is taken in the summer. This is boiled with water for several hours until quite soft; the water is then drained off and the pulp place I in a covered pit and left for several weeks to ferment. It is then pounded in a mortar and kneaded with the hands and kept under water till required. Spurious birdlime may be made by boiling linseed oil until it becomes sticky; this will take many hours. Another preparation is composed of boiled linseed oil 3oz., gum thus or Venice turpentine 1 oz., and castor oil 1 oz.