Glue is one of the best materials tor withstanding paraffin or any other oil. Another cement is made by dissolving 1 part of caustic soda in 5 parts of water, and boiling with 3 parts of resin till dissolved. Afterwards stir into it about half its weight of plaster-of-Paris or chalk, and use at once, as it hardens rapidly. This cement would take the place of red lead or white lead. Common yellow soap is also recommended for withstanding paraffin.