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The Tuscan Base, Fig. 109, is half a Diameter high, half of which goes to the Plinth and half to the Base Molding, which is made to include the Cincture, or broad Fillet at the bottom of the Shaft, counted as part of the Base. The same is true of the Doric Base. But this is merely saying that the Tuscan and Doric Bases are not quite half a Diameter high.
All the other Bases, including the Attic Base, are just half a Diameter high. All the Plinths are eight-sixths wide and one-sixth high, except the Tuscan and Doric, which are one-quarter of a Diameter high.
The Tuscan Capital, Fig. 109, is half a Diameter high, or three-sixths, the upper sixth comprising the Abacus with its Fillet, the middle sixth the Echinus and the Fillet below it, and the lower sixth the Necking. The upper Fillet is a quarter of a sixth wide, the lower one a sixth of a sixth. The Abacus is seven-sixths wide; i. e., it projects one-sixth on each side beyond the upper diameter of the Shaft.
The Doric Capital, Fig. 110, is also three-sixths of a Diameter high, the two upper sixths being divided into thirds, and these again into thirds, to give the height of the smaller moldings. The Denticulated Capital generally has three Fillets, the Mutulary, a Bead and Fillet.
The Astragal, which in the other Capitals is one-twelfth of a Diameter high, or half a sixth, is in the Tuscan and Doric Orders one-fourth smaller, or one-sixteenth of a Diameter, the Bead being one twenty-fourth of a Diameter high, or a quarter of a sixth. In drawing the Astragals, draw first the horizontal line at the top, which occupies two-thirds of the projection, otherwise the Conge below is apt to be slighted. The Bead and Congé should have their full measure of 180 degrees and 90 degrees, Fig. 111.
The Ionic Capital, which is one-third of a Diameter in height, or four-twelfths, is also divided into three parts, but unequally. The Abacus occupies the upper quarter, or one-twelfth, and had better be put in first. The Echinus occupies rather more than half of the remaining space, namely, five-ninths. In the Composite Capital, the Abacus occupies the upper sixth, and a little more, and the Echinus and the Astragal the next one, Fig. 82.
The Eyes of the Ionic Scroll come in line with the top of the Astragal and with the lower Diameter of the Column, and should be put in first, Fig. 112. The Scrolls make three complete turns and finally are tangent to the upper side of the eye. They can best be drawn by putting in first three semicircles on the outer side, and then three smaller ones on the inner side. In working on a small scale, two semicircles on each side suffice, or three on the outer side and two on the inner, as in the figures. But one is never enough. The Eyes of the Composite and of the Roman Ionic Capitals are set nearer together, Fig. 82.
In drawing a Corinthian Capital, Fig. 113, it is best to put
