Hamlin, A. D. F. (Alfred Dwight Foster), 1855-1926 · New York [etc.] Longmans, Green, and co. · leaf 156
course forms a species of arch, by virtue of its convexity. At the crown of the four arches on which they rest, these courses meet and form a* complete circle, perfectly stable and capable of sustaining any superstructure that does not by excessive weight disrupt the whole fabric by overthrow- *… … FIG. 71. — DIAGRAM OF PENDENTIVES. 124 HISTORY OF ARCHITECTURE. ing the four arches which support it. Upon these pen-dentives, then, a new dome may be started of any desiredcurvature, or even a cylindrical drum to support a stillloftier dome, as in the later churches (Fig. 71 b). Thismethod of…
Architecture -- History
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