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 it has the defect of liability to rust; the surfaces of other metals may tarnish, but iron rusts through. For the present only one application of cast iron concerns us—its use for grates and stoves. The point to remember is, that as the material has but little beauty, its employment should be restricted to the quantity prescribed by the demands of utility. Wrought iron, on the contrary, gives very great scope to the artist, and it offers this peculiar advantage, that the necessity of striking while the iron is hot enforces such free dexterity of handling in the ordinary smith, that he has comparatively little to learn if set to produce ornamental work, and thus renewed interest in the art has found craftsmen enough who could readily respond to the demand made upon them.

Copper, distinguished among metals 78