. An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth. ight lines N</, Oe, Vf, cutting HM at IKLIM. Draw /im perpendi-cular to BC. Make hr, hs, ht, ha respectively equal to Hll, IIS, HT, HA, and draw rn, so, tp, aq perpendicular to BC ;also from the points defy draw the lines dn, eo, fp, gq, and through the points hnnpq draw a curve, which will form theother bracket re<juired. 2087. Whether brnckets occur in external or internal angles,tlie method of describing them is the same, and when thebracke
. An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth. ight lines N</, Oe, Vf, cutting HM at IKLIM. Draw /im perpendi-cular to BC. Make hr, hs, ht, ha respectively equal to Hll, IIS, HT, HA, and draw rn, so, tp, aq perpendicular to BC ;also from the points defy draw the lines dn, eo, fp, gq, and through the points hnnpq draw a curve, which will form theother bracket re<juired. 2087. Whether brnckets occur in external or internal angles,tlie method of describing them is the same, and when thebrackets from the two adjacent walls have the same ])rojection,one of them inust be given to find the angle bracket. Whenthe brackets from these walls have unequal but given projections,then the form of one of the brackets must be given in form tofind tlie angle bracket. 20S8. To form a bracket for a moulded cornice. On the draw-ing of such cornice, draw straight lines, so as to leave sufficientthickness for the lath and plaster, which should in no case beless than three-fourths of an inch. Thus the general form ofthe bracketing will be iOS9. We have, in a foregone page, mentioned a method of constructingrii)s in thicknesses. We here present tothe reader two designs for dome-framing,wherein there is a cavity of framed worki)et\veen the inner and outer domes ; withmoderate spans, however, simple framingis all that is re(]uired. Fig. 730. A is adesign for a domical roof. B exhibits themethod of framing the curb for it tostand upon, the section of the curb beingshown upon fig. A. The design heregiven is nearly the same as that used forthe dome of the Pantheon in OxfordStreet, which was destroyed by fire. C isanother design for a domical roof, which isnarrow at the bottom part of the framing,for the purpose of gaining room withinthe dome. PENDENTIVES. 2090. If a hemisphere, or other portionof a sphere, be intersected {fig. 731.) by domes with
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