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The City and Country Builder's and Workman's Treasury of Designs: or, The Art of Drawing and Working the Ornamental Parts of Architecture : illustrated, by upwards of Four Hundred Grand Designs, for Peirs, Gates, Doors, Windows, Niches, Buffets, Cisterns, Chimney Pieces, Tabernacle Frames, ... Monuments, Fonts, Obelisques ... : finely engraved on 186 large quarto plates; proportioned by aliquot parts : to which are prefix'd the Five Orders of Columns; according to Andrea Palladio ... : the whole interspersed with sure Rules for Working ...; for the immediate Use of Workmen never published before, in any Language / Batty Langley
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Of the TUSCAN ORDER.

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P R O B. IV. To determine the Projections of the

Dado , Baft and Cornice of the Tuscan Pedestal ,Fig. II. Plate I.

(i.) Divide QN, equal to the Height of theBase in 5 Parts, and the upper 1 in 7 Parts ;Make z O the Projection of the Dado, equal to4 Barts and f. (2.) The Projection of thePlinth (qp) is equal to (r q) the Height of theMouldings on the Plinth, as also is the Projectionof the Cornice, from the Upright of the Dado,in every Order. Draw x y at Pleasure, at anyPart against the Dado, which divide in 6 Parts,and terminate the Members in the Base and Cor-nice, as is expressed by the dotted Lines proceed-ing upward and downward from them.

Fig. G. exhibits the Manner of describing aCima rfeversa at large, whose Projection is « ofits Height.

P R O B. V. To proportion the Heights of the prin-cipal Parts of the Tuscan Column , Fig. I. PI. II.

(1.) Divide the given Height in 7 equal Parts,and take 1 for the Diameter of the Column at itsBase ; therefore note, that the Height of the Co-lumn is 7 Diameters. (?..) The Height of theBase, and of the Capital, are each half a Dia-meter.

P R O B. VI. To proportion the Heights of theMembers of the Base of the Tuscan Column.

Divide s t the Height of the Base in 2 Parts, asthe Base on the Pedestal Fig. II. Plate I. the low-er 1 is the Height of the Plinth D, and the upper1 of its Torus C, with the Cincture B, which isa fourth Part thereof.

PR OB. VII. To proportion the sleights of theMembers of the Tuscan Capital.

Divide, the Height of the Capital M R, into 3Parts, as jn Fig. II. Plate II. give the upper 1 to itsAbacus M N, the Middle 1 to the Ovolo O withits Fillet P, which is a sixth Part, and the loweri to Q_the Neck of the Capital. The Heightof the Astragal R S, is equal to Half the Heightof the Neck, which divide in 3: Give 2 to theAstragal R, and 1 to the Fillet S. Note, TheAstragal in every Order is a Part of the Shaft,net of the Capical.

PROB. VIII. To diminish the Shaft of the Tuscan,or any other Column, Fig. I. Plate II.

(1 .) Divide the given Height of the Shaft be-tween the Cincture B, and Astragal A, into 3equal Parts, and draw the Line nxy, thoughthe first Part, parallel to the Cincture 4, 5; makeB 4, B 5, and x n, x y, each equal to Half aDiameter, and draw the Lines 4 n, $y-, makeA b, and A c, each equal to \ or f of n x, ac-cording to what Quantity you have a Mind to di-minish the Shaft some making the Diminution£ or f> as in this Example. (2.) On x describethe Semicircle nr 1 y, and draw the Lines b r,and c 1, from the Points be, parallel to the cen-tral Line A B. Divide the Arches n r and 1 y,each into any Number of like equal Parts, sup-pose four, as at op q, and 2, 3, z, and draw theOrdinates q 2, p 3, and oz. (3.) Divide A xinto the fame Number of equal Parts as in n r ,or 1 y, as at / h d, and draw the Lines, e f equalto q 2 •, g i equal to p 3, and k m equal to 0 z.(4.) From n, through the Points k ge, draw thecurved Line n kg e b, and from y through thePoints m i f, the curved Line y m i f, which com-pletes the Diminution of the Shaft as required.

PROB. IX. To determine the Projections of theMembers in the Base of the Tuscan Column,Fig. I. Plate I.

(1.) Divide the Semidiameter in 3 Parts, andturn 1 Part out for the Projection of the Plinth,which in every Order, stands exactly over theDado of the Pedestal. (2.) The Projection ofthe Torus is always the fame as of the Plinth.(3.) Divide the Projection of the Plinth before theUpright of the Shaft into 4 Parts, and the thirdPart into 4, then the first 1 Part terminates theProjection of the Cincture B.

PROB. X. To determine the Projections of theMembers in the Tuscan Capital, Fig. II. PI. II.

Divide the Semidiameter of the Shaft continuedto the Abacus into 2 Parts, as at /, and makethe Projection of the Abacus, equal to t of thoseParts, when the Abacus is finished with a Fillet,and to I of I Part, when without a Fillet. TheProjection of the Fillet under the Astragal, is e-qual to twice its own Height, and the Fillet un-der the Ovolo, to its Height.

PROB.

 
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