. An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth. Chap. III. IVFASONRY. 603 Let. draw the line nt, whicli is the slope. Then draw the curve mprt. and from tlie point n drawthe joint lines/»> and rX. The centre of tliis gate is represented (in the upper part of thedia<rram) with voussoirs, and the keystone placed beliind to show the mitre of the sofite moulds serve for curving the ends of the stone where the intrados meets tliesurface of the two walls. It must, however, he observed,
. An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth. Chap. III. IVFASONRY. 603 Let. draw the line nt, whicli is the slope. Then draw the curve mprt. and from tlie point n drawthe joint lines/»> and rX. The centre of tliis gate is represented (in the upper part of thedia<rram) with voussoirs, and the keystone placed beliind to show the mitre of the sofite moulds serve for curving the ends of the stone where the intrados meets tliesurface of the two walls. It must, however, he observed, that, previous to the applicationof tlie sofite mould, the concave surface of the intrados must he formed by a mould with nconvex edoe, and then the soHte mould or moulds of developement must be bent into thehollow, so tiiat the two parallel edges may coincide with the corresponding edges of thestone. The an-les which the intrados makes with the joints are taken from the elevatioi*of the face of the arch. This elevation is no more than a section of the arch perpendicularto the axis of the cylinder which forms the intrados. loss. To cunstruct a semicirciilar-Zieaded arc
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Keywords: ., bookcentury1800, booksubjectarchitects, booksubjectarchitecture
