This fine color, used in oil-painting and for porcelain and enamel, is prepared in Italy by n secret process. Dr. Ure gives the following recipe: 12 parts of metallic antimony are to be calcined in a reverberatory furnace with 8 parts ot red lead and 4 parts of oxide of zinc; the mixed oxides are to be fused, and the mass then triturated and elutriated in o a fine powder. Many of the purposes for which Naples yellow was formerly applied, are now supplied by chromate of lead.