For small pictures, especially where minute finish is required, panels have many advantages over canvas, and are less liable to injury from damp, blows, etc. Mahogany is the wood generally prepared; if unprepared wood is used it should first be sized, and painted with a good ground of flake white and a little bright red, and when perfectly dry rubbed down with fine sand-paper; if the wood is inclined to warp, prime over both sides. Panels prepared can be obtained up to 36 by 28 ins.,