. An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth. e panels are sunk.: the effect of the star is that of a group ofbranching ribs. It is manifest that the constructive details of these two sorts of vaultingare vastly different. In the one, the de|)cndence is upon ribs which support, by rebates onthem, the tilling-in panels; while in the other tlie principle is similar to tliat of dome-vaulting. This will be immediately perceived by refeience to the plan G, in wliicli tiiecourses are marked, as also


. An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth. e panels are sunk.: the effect of the star is that of a group ofbranching ribs. It is manifest that the constructive details of these two sorts of vaultingare vastly different. In the one, the de|)cndence is upon ribs which support, by rebates onthem, the tilling-in panels; while in the other tlie principle is similar to tliat of dome-vaulting. This will be immediately perceived by refeience to the plan G, in wliicli tiiecourses are marked, as also in the part of the section marked H. Ibe plan I shows thetracery of the soffite of the vault. The author above quoted observes, The constructionof these fan vaults is in all examples so nearly the same, that they seem to have proceededfrom the same workshop , and it is remarkable that, at least as far as I know, there are an R12 TIIKORY OF AUCHlTECrURE, Book II C()ntinent:il examples of them ; wliereas, of tlie previous vaults, there arc quite as manyon the Continent as in England. In France, indeed, the lienie (ribbed) vuuits are not. HENUr THE SEVESTllS CIIAPEI,, WKSTMIXSTER. very numerous; they are confined to small chapels, and tlieir patterns are in general in Germany and in the Netherlands there is an abundance of tliem, distinguished, cer-tamly, from ours by local peculiarities, but nevertheless of similar mechanical construction,and requiring the same geometrical methods. 2002t. The iniroduction of (an vaulting seems to have occurred in the beginning of the15th century. The first instance wherein the span was considerable is the Deans Chapelsittached to the north-west transept of Canterbury Cathedral. In St. Georges Chapelat Windsor, tiie aisle and central compartment only have fan vaults, the principal vaultnot being fanwork. The chief orks of this kind, of known date (about ), areHenry tlie Sevenths Chapel at Westminster, Kings College Chapel at


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