If the fossils are in section or have a flat surface, rub them down with line sand and water on a smooth stone until the face is level. Wash away the sand and rub them on a wet stone until the scratches are all removed and the fossils appear quite smooth, but dull. Now rub them on a smooth piece of wood or glass, using dry crocus or rouge, and. when a dull polish is gained, finish on a piece of felt with dry putty powder. If the fossils are not flat the rubbing must be done with cloths, using the materials as above described.