A dictionary of architecture and building; biographical, historical and descriptive (1901)
Sturgis, Russell, 1836-1909 · New York, Macmillan · leaf 558
Fig. 58 (Plan).954 VAULT The form is used in the capitol at Albany, N.Y.,for supporting stairs. … 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.
Architecture
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