The Capital
The Capital is the culminating feature of the column in which horizontal lines predominate in æsthetic contrast to the vertical lines of the shaft. In all the orders there is some form of crowning block or moulding known as the abacus.[A]
[A] Though the proportions given are approximately accurate for general division, it will be found necessary in detailing to adopt a more intimate system of measurement. In the following diagrams the diameter is divided into 36 parts, which are expressed in figures, giving heights, etc., of the various features.