When mouldings are decorated the details ranging above each other should be so distributed as to fall in vertical alignment. This is particularly necessary when the Ovolo enrichment occurs below dentils, or where it is surmounted by Modillions as in the Corinthian cornice. Panel mouldings cannot legitimately be considered as functional in the foregoing sense, though in wood-work they are directly incidental to the construction. Regarded as frames, their general purpose may be considered as to bind or enclose. In stone-work it may be at times desirable to introduce panel effects, which may be obtained by boasting out or recessing parts, possible only on a large scale. A comparatively simple and justifiable treatment is to sink channels of moulded profiles framing the enclosed area, which is left in the original plane. A treatment that is effective and comparatively economical. [Illustration: CHANNELLED MOULDING IN STONE No. 138.] _Wood Panelling_ Panelling in wood-work is not only legitimate, but structurally necessary, as it is not practical to cover large areas except by some method of building up. Therefore, not only panelling, but doors and structural wood-work generally are constructed of stiles [Illustration: No. 139. Panel Mouldings in Wood. A. Late Linen-fold Panel, with scribed mouldings on stiles and rails. B. C. Panels of Settleback and Chest, with framing with simple moulded edges. D. Early Jacobean Panelling, with stopped mouldings on stiles and rails. E. Later Jacobean Panelling. F. Later Jacobean Section of applied mouldings of the Bolection type. ] and rails, forming framings; the spaces enclosed being occupied by the panels. The edges of the stiles and rails are moulded. In the late Gothic and Tudor periods the mouldings were often simply scribed; but later the profiles became more distinct in contour. These early mouldings were narrow and simple in form, arrived at mainly by softening or rounding the square edges of the frame. _Applied Mouldings_ Applied mouldings were apparently employed in the Jacobean period, and the sections became more elaborate. Worked independently, they were frequently higher in relief than the framings. The facility with which they could be worked and applied resulted at this period in a fashion for complicated mitreing hardly justifiable from a constructional point of view, though effective if not overdone. [Illustration: No. 140. Applied Mouldings.] In the composition of such mouldings it is desirable that the sizes and contours employed should be contrasting, and that all curved sections be divided by fillets. As the width of the moulding throughout is uniform, it is obvious that mitral angles must be perfect bi-sections of the meeting lines. With regard to proportion, the width of mouldings may generally be one-fourth to one-eighth that of the panel according to desired effect, robust or refined.