Abacus, a square tablet which crowns the capital of the column.
This, as pictured in the text, is the common Gerbert abacus.
The height of the abacus is one seventh of the height of the capital.
The flowers on the four sides are to be made as large as the height of the abacus.
The abacus has a width equivalent to the thickness of the bottom of a column.
The abacus is the crowning member of the capital, as the capital is of the column.
But evidently the projecting corners of the abacus at a, Fig.
The steeper the slope of the bell, the thinner may be the abacus.
Though the month was February below it was May in the abacus of the column.
Norman abacus blended with Early English foliage in capitals.