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THE

ART of DESIGNING and WORKING

THE

ORNAMENTAL PARTS of BUILDINGS.

CHAP. I.

Of the Manner of Proportioning the Five Orders of Columns in Architecture

by Aliquot Parts.

I. Of the TUSCAN ORDER.

PR OB. I. To proportion the Heights of the princi-pal Parts of Tuscan Order , Fig. I. Plate I.

RACTICE. Divide ao a givenHeight into 5 equal Parts, the low-er 1 Part k 0 is the Height of thePedestal. Divide a k the remain-ing 4 Parts into 5 equal Parts, theupper 1 Part a d, is the Height ofthe Entablature, and d k, the lower 4, of theColumn.

PR OB. II. To proportion the Heights of the prin-cipal Parts of the Tuscan Pedestals Fig. II.

Divide v w, a given Height into 4 Parts, the

lower 1, is the Height of the Plinth, , of thenext 1, of the Mouldings on the Plinth, and halfthe upper 1 of the Cornice.

PROB. III. To proportion the Heights of the Mem -hers on the Plinth ; and of the Cornice of theTuscan Pedestal.

If the Mouldings on the Plinth be an InvertedCima recta between two Fillets, divide the Heightin 6, give 1 to each Fillet, and 4 to the Cima;but if the Mouldings are a Caveto on a Fillet,give 4 to the Caveto and z to the Fillet. Di-vide the Height of the Cornice in 6, give theupper 1 to the Regula E, the next 3 to the Fas-cia F, and the remaining a to a Cima reverfa, ora Caveto with its Fillet, whose Height is halfone Part.

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PROB.