. An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth. tlnough the pointsA6cViVIJ diaw the curve. Find theextrados or outer line Vifghi in a mannersimilar to that in which the inner curvehas been found. Draw the ))oints h(, eg,dh, ei. Prolong All ami BG to K andL, and draw the lines bb, cc, dd parallel to AK 1977. To make the straight arches. Draw KL perpendicular to AK, and produce K/andf/. Transfer the distances between the points m, I, k, E, and the line QD to ordinates of the lower arc from h to v,
. An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth. tlnough the pointsA6cViVIJ diaw the curve. Find theextrados or outer line Vifghi in a mannersimilar to that in which the inner curvehas been found. Draw the ))oints h(, eg,dh, ei. Prolong All ami BG to K andL, and draw the lines bb, cc, dd parallel to AK 1977. To make the straight arches. Draw KL perpendicular to AK, and produce K/andf/. Transfer the distances between the points m, I, k, E, and the line QD to ordinates of the lower arc from h to v, from cto u\ from d to .r, and from e to y, and drawthe curve AvivxyLi. Also find the outer ciuve inthe same manner, and draw VT at right anglesto AH. 1978. To find the moulds of the sofites. Drawthe line WX. (fig. 652.) in any convenient sur-face, and lay the breadths of sutite, not from thearc ABC as before, but from those of the riglitare , that is, transfer the distance Kv,WW, , xg. yL to the line WX upon Wa, ab, be,Cil, and dX. Tlnough the poi .ts WabcdX., diawfht lines rfy, el, fk, yl, km, yz, pervpndicular to ?per Qlv.\i-. Fin. Lfo the ./ III ,\^^ ^ / w ,x . ? • ? ? .••?^S X >J Fie CHPf. III. IVIASONKY. 631 WX. Triinsfer the distances 1 A, 2b, 3c, id, 5e upon the perpeiidieulars to WX ; thatis, from a to e, from b to/, from c to g, from (/ to h, and from X to y, and join t/g, ef,fg, yh,hy. Ill the same maimer draw the line yihlmz, which will complete tlie sotites. 1979. To find the moulds of the joints. Transfer the distances v0, wy, xS, ye, to the lineXW from a to a, from b to )3, from c to •>, and from d to 5, and through the points, a, yS, 7, 5draw the lines nr, os, pt, 5u perpendicular to WX. Find the ]M>ints w, o, p, q, as also, r,s,t,u, -mm the preceding examples : then the moulds of the joints will he tirn, f/iso, ptl(;, h^um. Itumst be observed that the boundaries, or extiados and intrados, Dili, ACB of the ring ofthe arch, d
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