. An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth. FiB. 1015. Fis. 1016. FiK 1017. divisions be covered with a quadrangular dome, or, in other words, a quadrantal cove,mitred at each angle, twelve columns would be required for its support. If the vault werecylindrical {fig. 1016.) eight columns only would be necessary ; but if the form of thecovering be changed to the groined arch {fig. 1017.), four columns only will be a room of similar form on the plan contained seven interaxal
. An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth. FiB. 1015. Fis. 1016. FiK 1017. divisions be covered with a quadrangular dome, or, in other words, a quadrantal cove,mitred at each angle, twelve columns would be required for its support. If the vault werecylindrical {fig. 1016.) eight columns only would be necessary ; but if the form of thecovering be changed to the groined arch {fig. 1017.), four columns only will be a room of similar form on the plan contained seven interaxal divisions each way,twenty columns must be employed for the coved vault, twelve columns for that whosecovering was semi-cylindrical, and still but four for thegroined vault. It is olivious, therefore,keeping economy in mind, that the consideration and well weighing of this matter ismost important, inasmuch as under ordinary circumstances we find it possible to make fourcolumns perform the office of twelve and even twenty. Here, again, we have proof of thevalue of the interaxal system, whose combinations, as we have in the previous section ob
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