When making gelatine moulds for easting plaster ornaments, etc., the glue or gelatine must be of good quality; it is soaked in water till soft, and melted over the fire in the usual way. The gelatine must be of just sufficient consistency to pour from the can and enter into the finest markings of the model. The mould should first be dusted over with French chalk, which is afterwards carefully brushed off. Before pouring in the plaster, oil the mould with paraffin oil in which a piece of composite candle has been melted. This will put a clean, smooth skin on the mould, and prevent the plaster from sticking. The cast should be removed from the mould as soon as possible, and before the plaster begins to heat. The mould will peel or scale on the casting through using poor gelatine, through not oiling the inside of the mould properly, through allowing the plaster to set and become warm before being removed, and through using the gelatine too thin.