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3If Ionic, they are to be set out so that the base may each way be equal to the thickness and three eighths of the column. Its height and that of the plinth the same as the attic base. The plinth is the same height as in that of the attic base, the remainder, which was equal to one-third part of the column’s diameter, must be divided into seven parts, three of which are given to the upper torus; the remaining four parts are to be equally divided into two, one of which is given to the upper cavetto, with its astragals and listel, the other to the lower cavetto, which will have the appearance of being larger, from its being next to the plinth. The astragals must be an eighth part of the scotia, and the whole base on each side is to project three sixteenths of a diameter.
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