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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 616

An illustration from An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth, 1888, leaf 616
mrning the arch upon the intersections; or the angles are found by the following practi^almethod. The groins meet in the points I, C (Jiff. 6S9.), upon the boarding of the twogroins. Place the straight edge of a board upon the point I, so as to range over the lineGH on the ])lan Then set up another…

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