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An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth (1888)

Gwilt, Joseph, 1784-1863, Papworth, Wyatt Angelicus Van Sandau, 1822-1894 · London Longmans, Green · leaf 410

An illustration from An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth, 1888, leaf 410
he invariably found that the rib itself is thinner tlian the uniform thickness of theRoman vault under similar circumstances: and that the jianel, which is the principal partof the vault in superficial quantity, sometimes does not exceed one ninth part of the rib inthickness. The Gothic architects,… … Fig. 590(7. Fig. 590A. H99/. In the second example (_/?./• 590ff.), another rib, a 6, is introduced, which on plaiproduces the form of a star of four points. The forms of tliese thus inserted ribs resultfrom curves of the lines on the plan in the space to be vaulted. As many radii are drawn

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