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Knight's Mechanical Encyclopedia (ed. Knight) 2 0 Browse Search
Southern Historical Society Papers, Volume 35. (ed. Reverend J. William Jones) 2 0 Browse Search
Colonel William Preston Johnston, The Life of General Albert Sidney Johnston : His Service in the Armies of the United States, the Republic of Texas, and the Confederate States. 1 1 Browse Search
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Knight's Mechanical Encyclopedia (ed. Knight), A. (search)
n diameter) through which the above immense quantity of water was delivered, amounted to about 14,900 superficial inches; but the supply was subsequently reduced to 1170. The waters were collected in reservoirs called castella, and thence were conveyed through the city in leaden pipes. The keepers of the reservoirs were called castellani. Agrippa alone built thirty of these reservoirs during his aedileship. There are five modern ones now standing in the city: one at the Porta Maggiore, Castello della Acqua Giulia, della Acqua Felice, della Acqua Paolina, and that called the Fountain of Trevi. The aim of the Roman aqueduct-builders was to conduct the water along with an equal fall during the whole distance from its source to the point of delivery; and for this purpose, instead of allowing the conduits to follow the natural slope of the ground, they almost always erected long and massive stone arcades wherever it was necessary to cross a valley, instead of availing themselves of