Page:Ware - The American Vignola, 1920.djvu/26

16 of a Diameter high, and are set one-sixth on centers, or on edges, instead of one-eighth, as in the Denticulated Doric. Two-thirds of this sixth go to the width of the Dentil and one to the space between, ,or Interdentil. The Dentil is, accordingly, one-ninth of a Diameter wide, and the Interdentil one-eighteenth, instead of a twelfth and a twenty-fourth. A Dentil is put on the axis of a column, and an Interdentil comes just over the outer line of the Frieze. There is, apparently, a Double Dentil on the corner, the outer face of which is two-thirds of a Diameter, or four-sixths, from the axis of the column. The first half of it, as in the Denticulated Doric, comes over the outer face of the lower end of the shaft, Fig. 93. There are two Dentils between the one over the column and the Double Dentil, in place of three, as in the Doric.

The Ionic Capital, like the Doric, has an Echinus and an Abacus crowned by a Cyma Reversa and Fillet. But generally it has no Necking, and it is, accordingly, only two-sixths of a Diameter in height, or one-third instead of one-half. Both the Echinus and the Cymatium that crowns the Abacus are larger than in the Doric, and the face of the Abacus smaller, and the Echinus projects in front of the Abacus, instead of being covered by it. The Abacus and its Fillet extend beyond the Echinus on either side, and are curled up into the Scrolls, or Volutes, Fig. 65, the whole height of which is a half Diameter, measuring down from the Architrave. The Eyes of the Scrolls are one-third of a Diameter from the top, on the line separating the bottom of the Capital from the top of the Astragal that crowns the Shaft. They are just one Diameter apart on centers, coming over the outer lines of the lower end of the Shaft, and the inner edges of the Scrolls are two-thirds apart. The Echinus is generally carved with Eggs and Darts, three of which show between the Scrolls, the next one on either side being hidden by sprigs of Honeysuckle Ornament. These Scrolls, Fig. 66, show on the sides a series of moldings called the Baluster, or Bolster. The term Abacus is generally held to apply only to the Cyma Reversa and Fillet, above the Scrolls.

The Shaft of the column is ornamented with twenty-four Flutings, Fig. 67, semicircular in section, which are separated not by an Arris, but by a Fillet of about one-fourth their width. This makes the Flutings only about two-thirds as wide as the Doric Channels, or about one-ninth of a Diameter, instead of one-sixth. Four-fifths of one twenty-fourth of the circumference is .106 of a Diameter, while one-ninth of the Diameter is .111, a difference of less than a twentieth.

The typical Ionic base is considered to consist mainly of a Scotia, as in some Greek examples, Fig. 69. It is common, however, to use instead what is called the Attic Base, Fig. 70, consisting of a Scotia and two Fillets between two large Toruses, mounted Plinth, the whole half a Diameter high. The Plinth occupies the lower third, or one-sixth of