Page:Arts & Crafts Essays.djvu/95

 one metal is, for purposes of adornment or preservation from corrosion, coated with a thin film or deposit of another, usually more costly, metal.

Though hereafter electro-metallurgy may assert its claim to artistic originality as a third division, for the present all metal work, so far as its artistic aspect depends upon process, falls naturally into one of the two broad divisions of cast metal and wrought metal. Both have been employed from a time long anterior to written history; ornaments of beaten gold, and tools of cast bronze, are alike found among the relics of very early stages of civilisation, and in early stages both alike are artistic. The choice between the two processes is determined by such considerations as convenience of manufacture and the physical properties of the metals, and the different purposes in view. When 71