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A key to civil architecture, or the universal British builder : containing the principles and properties of building ... : also, a strict enquiry into the present manner of building and mode of finishing ... : with a new criterion, or universal estimator ... : to which is added, a treatise of arithmetic, extraction of the roots, duodecimals, mensuration of superfices and solids, round and square timber, &c. ... / by Thomas Skaife
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The Universal British Builder. 65

ble measure. Fan-light, when measuredby the foot, you multtake the width of thedoor and the heightof the crown. Ob-serve also in girtingthe impost, that youtakefromthegrottnds,and extend the lineall round the face ofthe moulding, andlikewise the same withrespect to the ovlo.

Though the abovedimensions are con-tingently set down,without propriety totheir respective pro-portions, yetthe man-ner will serve to in-struct the learnerthe same : after themeasurements arethustaken, the mode ofsquaring them is fa-miliar ; the differentprices to all the di-mensions will be con-sidered in the prac-tice of frontispieces.

Ditto raking.

5 _

Impost round the Jamb-linings.

Ft. In.

8 o Length6 Girt

Jamb-linings,bead,andflulh.Ft. In.

7 o Length1 8 Breadth

twice.

Circular sopheat, bead, andfluff.

Ft. In.

5 o Length ) Double1 8 Breadth $ measure.

Door-case.

Ft. In.

7 4 Length ) Scantling

4 o Width $ 4 by 3.

Ovlo round the circularhead.

Ft. In.

5 o Length ) Double2 5 Girt $ measure.

Fan-light.Ft. In.

3 6 Width1 9 Height

I

Door