. An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth. neralname by which we shall designate them, be their application what it may — are usuallys(]uares, parallelograms, ])oiygons, circles, semicircles, &c. ; their size, of course, service whereto they are applied. Some will require only one, two, or three inter-axal divisions ; others, five, seven, or more. It is only these last in which columns becomeuseful; and to such only, therefore, the system is usefully applied. The parts whereo
. An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth. neralname by which we shall designate them, be their application what it may — are usuallys(]uares, parallelograms, ])oiygons, circles, semicircles, &c. ; their size, of course, service whereto they are applied. Some will require only one, two, or three inter-axal divisions ; others, five, seven, or more. It is only these last in which columns becomeuseful; and to such only, therefore, the system is usefully applied. The parts whereof wespeak may belong to either public or private buildings : tlie former are generally confinedto a single story, and are covered by vaults of equal or dillerent spans ; the latter haveusually several stories, and are almost invariably covered with roofs or flats, 2849. When columns are introduced into any edifice to diminish the action of the vaultsand increase the resistance to their thrust, the choice of the species of vault must be wellconsidered. If, for exarnplft, the vaulLof a s<]uare apartment {fig. 1015.) of five interaxal.
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