The builder's dictionary, or, Gentleman and architect's companion : explaining not only the terms of art in all the several parts of architecture, but also containing the theory and practice of the various branches thereof ... : also necessary problems in arithmetic, geometry, mechanics, perspective, hydraulics, and other mathematical sciences : together with the quantities proportions, and prices of all kinds of materials used in building ... (1734)
Toms, W. H. (William Henry), ca. 1700-ca. 1750, Devoto, John, fl. 1719-1752 · London : Printed for A. Bettesworth and C. Hitch ..., and S. Austen ... · leaf 33
ndicular raifed in the Middleof that Line, is the Sine of theArch, as A and B in the Figure. Every Circle is fuppofed to bedivided into 360 Degrees, and anArch is eftiniated according to theNumber of thcfe Degrees it takesup;—Thus an Arch is faid to be20, 30, 5-0, 80, 100 Degrees. Equal ARCHES are… … they are of Circles of ditferentMagnitudes, yet are iimilar, bothcontaining the fame Number ofDegrees, as fuppofe 4$-. ARCH [in Architedure] is aconcave Building, raisd with aMould bent in the Form of theArch of a Curve, and ferving asan inward Support of any Struc-ture. Sir Henry IfottoK fays,an…
Architecture · Building
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