. An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth. FiR- ^^<. FiR. 589. Kame opening as the last mentioned. They are cut into eight equal parts by verticalplanes crossing each other in the axis; each of these parts is subdivided by a joint at45 degrees, altogether forming sixteen pieces. The vault stands on a circular wall of thesame thickness divided into eight parts corresponding to those of the vault. All the partsare so arranged as to form continued joints without any bond, in order to give th
. An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth. FiR- ^^<. FiR. 589. Kame opening as the last mentioned. They are cut into eight equal parts by verticalplanes crossing each other in the axis; each of these parts is subdivided by a joint at45 degrees, altogether forming sixteen pieces. The vault stands on a circular wall of thesame thickness divided into eight parts corresponding to those of the vault. All the partsare so arranged as to form continued joints without any bond, in order to give theexperiment the most disadvantageous result. Yet it stood firmly, and was even capable ofbearing a weight on the top. 1479. If for these eight pieces of circular wall we substitute eight columns of equalheight, as in No. 1. fig. 589., so that the vertical joints fall over the middle of each column ;tiie vault will still stand, although the cube of these columns, as well as their weight,occupies only one nintli part of the circular wall for which tluy are substituted. From this it is evident that spheric al vaults, , domes, have less thr
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