Gothic architecture in France, England, and Italy . of the chapel, at OB the transverse arch BFM, and atB2Ir the rib BI. The result is that the crowns CFI arelevel; and the crowns of the transverse arches BH, BLare also level with one another, though lower than remains to fill in the triangular vaults which repose onthese pointed arches. The lines of the crowns of thesefillings-in necessarily abut on the point of each of these 1 , Diet. Rais. IX. 505. ch. in] THE GOTHIC VAULT 47 arches as the dotted lines show, and they meet on theaxial line CG. The perfection of this system of
Gothic architecture in France, England, and Italy . of the chapel, at OB the transverse arch BFM, and atB2Ir the rib BI. The result is that the crowns CFI arelevel; and the crowns of the transverse arches BH, BLare also level with one another, though lower than remains to fill in the triangular vaults which repose onthese pointed arches. The lines of the crowns of thesefillings-in necessarily abut on the point of each of these 1 , Diet. Rais. IX. 505. ch. in] THE GOTHIC VAULT 47 arches as the dotted lines show, and they meet on theaxial line CG. The perfection of this system of vaulting at S. Denis Persistencewas only reached after many tentative experiments. It fraditionofwas some time before the builders, with the tradition of vaultln£Roman cross-vaulting still strong within them, graspedthe idea of the full liberty at their disposal, and dismissedfrom their minds the theory that a vault necessarilyresults from the intersection of simple curved first, as at Morienval, the diagonal ribs were not Morienvai. drawn straight but on a curved line, such as would haveresulted from the intersection of two barrel vaults on acircular plan. At Langres, being used to diagonal inter- Langressections in one plane, they drew the diagonal ribs in a at e rastraight line (Fig. 17) from A to D, and C to B with theresult that the point of intersection was not over themiddle of the aisle but near one side of it with a veryawkward effect. There is another instance of this in theSouth Choir aisle of S. Pierre at Chartres. This wasremedied when the discovery was made that the two 48 THE GOTHIC VAULT [CH. Ill V Gothicvault per-fected atS. Denis Difficultyarisingfromclerestory Buttress-ing at InAuvergne At Vezelay halves of the diagonal need not lie in one plane butmight meet at an angle as BI — IK in Fig. 16. It isunnecessary to go into these experiments in detail forour present purpose1. Whatever approach may havebeen made towards a more scientifi
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Keywords: ., bookauthorjacksont, bookcentury1900, bookdecade1910, bookyear1915
