The home raanufac. ture of stoving enamel to be applied to metal is not advised. The utensils employed must be free from all dirt, and the ingredients must not contain traces of impurities, or a good-surfaced enamel will not be produced. For a dead white enamel, melt together 1 part of calcine (2 parts of tin and 1 of lead calcined together), 2 parts of fine crystal or transparent glass frit, and a very small quantity of manganese. Pour the fused mass into clean water, dry. reduce to powder, and again fuse, repeating these operations three or four times, taking care to prevent the enamel being contaminated by smoke, dirt, or oxide of iron. A superior white enamel is made by treating 1 part of washed diaphoretic antimony and :i parts of fine glass perfectly free from lead as before. For a black enamel, mix together 12 parts of calcined iron (protoxide) and 1 part of oxide of cobalt. This mixture is fused with an equal amount of white flux or enamel, made as in the first recipe above.