The division of the entablature is the same as that of the Ionic, and the mouldings, although more elaborate, are similar in character. The architrave and frieze are each three-tenths of the height and the cornice four-tenths. It will be seen from the foregoing that the diameters of the three orders are respectively one-eighth, one-ninth and one-tenth the heights of the columns, and that the entablature is, in the Doric, two diameters high or one fourth the height of the column; in the Corinthian also two diameters or one-fifth the height of the column. The Ionic is intermediate between the two. _Doric Entablatures_ The Doric cornice is three-quarters of a diameter in height and one diameter in projection from the face of the frieze, which should always be in vertical alignment with the architrave. It is convenient to divide the cornice height into three. The upper third consists of a crowning cavetto moulding, supported by a cyma reversa, under which is a facia or corona, in turn supported by a dentil course. The lower third should be taken as the centre of the dentil course, and if the height from the top of the cavetto to the underside of the corona be bisected, the point of bisection should fall in the centre of the intervening reversa. _Mutules_ In orthodox examples of the order the underside or soffit of the corona is decorated with a series of sunk panels. Those immediately over the triglyphs of the frieze are occupied by rows of conical drops. A variation of this and a treatment frequently employed is a series of brackets known as mutules. They consist of a facia and a reversa, which is carried round the upper edge to support the corona. When mutules are used the dentil course is omitted. [Illustration: No. 155. Doric Entablature, Vignola.] The dentils are rectilinear blocks on a flat projecting band, and they are supported by a cyma reversa moulding. A fillet beneath this moulding completes the cornice. The reversa is about the same height as the fillet, and the dentil course is about twice this height, but owing to the soffit of the corona sloping slightly upward and inwards the full height of the dentil facia is not apparent when drawn in elevation. [Illustration: No. 156. Doric Entablature, with Mutules.] Above the dentil facia is a small cavetto moulding and a fillet. These are directly beneath the corona, and are carried round to form the panels on its soffit. The Doric frieze is three-quarters of a diameter high. It is divided into panels technically known as metopes, by projecting features half a diameter in width which are called triglyphs. The metopes should be square, and one of the triglyphs is always placed immediately over each column, having the same central axis, hence the spacing of the columns apart is regulated by the triglyphs and metopes. Examples of various spacings of columns will be given later.