A dictionary of architecture and building; biographical, historical and descriptive (1901)
Sturgis, Russell, 1836-1909 · New York, Macmillan · leaf 557
Vaults may be classified thus : —As to form. Simple and Compound or Inter-secting ;As to construction, SoUd and Ribbed. … Solid Vaulting — Simple. The most an-cient form of vault is that known as the barrel,tunnel, wagon, or cradle vault. Its cross section
Architecture
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