Hamlin, Alfred Dwight Foster, 1855-1926 · New York, The Century Co. · leaf 389
ing the ribs, thus breaking up the twistedsurfaces of the fillings into long narrow triangles easyto handle. These additional ribs were called tiercerons(Figure 303) ; they terminated in a horizontal ridge-ribat the summit of the vault. Later, short bridging ribs, 361 A HISTORY OF ORNAMENT called… … Fig. 374. Hammer Beam Roof, Truxch Church. The decorative idea thenceforth predominated; thetiercerons being given the same curvature throughout,generated surfaces of revolution like inverted semi-conoids of concave profile, their bases meeting at the top,leaving lozenge-shaped voids which were…
Decoration and ornament -- History
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