A dictionary of architecture and building; biographical, historical and descriptive (1901)
Sturgis, Russell, 1836-1909 · New York, Macmillan · leaf 558
0m T Fig. 59 (Plass). (/) One component is semicircular and theother semielliptical, but of isnder span, theheights being equal; or both may be semi-elliptical. … Fig. 60 (Plan)- III. Oblique Vaults. (a) Figure 30. With straight axes and com-posed of equal barrel vaults, or of unequal, onebeing semicircular and the other semielliptical.
Architecture
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