A dictionary of architecture and building : biographical, historical, and descriptive (1902)
Sturgis, Russell, 1836-1909 · New York : The Macmillan company · leaf 564
Fig. 69. tiie i)anels may be of a lighter kind of stone,such as tufa or pumice, or even of brick. Thepieces that form the panels may run straight … from rib to rib, in which case the surfaces arecylindrical, conical, or conoidal; or they maybe arched from rib to rib, the surfaces thenbeing spheroidal or convex-conoidal. The ribs058 VAULT are of circular or elliptical curvature, formingsemicircular, semielliptical, pointed, three-cen-tred, or…
Architecture · Architects
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