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Tracts on vaults and bridges : containing observations on the various forms of vaults; on the taking down and rebuilding London Bridge : and on the principles of arches: illustrated by extensive tables of bridges : also containing the principles of pendent bridges, with reference to the properties of the catenary, applied to the Menai Bridge : and a theoretical investigation of the catenary / Samuel Ware
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66

OF RIBBED VAULTS.

are hemispherical domes, which have hemispher-ical pendents suspended from the vertex, whosediameters are about one-fourth of the diameter ofthe domes themselves, but the largest of thesedomes is not more than sixteen feet. The vault-ing over the place in which the Koran was keptis very curious. See Antiguedade’s Arabes de Gran-ada y Cordova.

 
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