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 coloured surface, and are polished so as to bring the colour fully out, and to protect the material from damp. In fine examples the veneers form little pictures, or patterns, either by the arrangement of the grain of the pieces used, so as to make pictorial lines by means of the grain itself, or by using woods of various colours.

A very fine surface decoration was invented, or carried to perfection, by André Charles Boule, for Louis XIV. It is a veneer of tortoise-shell and brass, with occasional white metal. An important element in Boule decoration is noticeable in the chiselled angle mounts, lines of moulding, claws, feet, etc., all of which are imposed, though they have the general character of metal angle supports. In fact, the tortoise-shell is held by glue, and the metal by fine nails of the same material, the heads of which 317