. An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth. uares ; the 6 columns, each 9 diametersin height, would requite 54 ; the 5 intercolumniations, double that number, or lOS, and theentablature and half pediment 54. Ronvin Octnstyk.—The Pantheon at Rome, which has a portico of 8 columns, is one ofthe best examples that can be selected for examination. The total width is 109 feet 10inches; the diameters of the eight columns 39 feet 5 inchos, and the seven intercolumnia-tions 70 feet 5 inches, or nearl
. An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth. uares ; the 6 columns, each 9 diametersin height, would requite 54 ; the 5 intercolumniations, double that number, or lOS, and theentablature and half pediment 54. Ronvin Octnstyk.—The Pantheon at Rome, which has a portico of 8 columns, is one ofthe best examples that can be selected for examination. The total width is 109 feet 10inches; the diameters of the eight columns 39 feet 5 inchos, and the seven intercolumnia-tions 70 feet 5 inches, or nearly in the proportion of 1 to 2. The height of the columns is46 feet 5 inches, and that of the entablature and half ])ediment 23 feet inches, togethei69 feet 7^ inches, nearly a square and a half, the area of which is 7647 feet 2 Fig. 1041. OCTASTYLE POHTICO OP THE PANTHEON. The united diameter of the columns, 39 feet 5 inches, multiplied by their height, gives1829 feet 7 inches, and tlie collected intercoluinniations multiplied by the same height willbe 3268 feet 6 inches : multiplying 109 feet 10 inches by 2,i feet 2 inches, we obtain forthe area of the entablature and pediment 2549 feet, which, rejecting parts of an incli, will,when added to the two other calculations, make up a sum agreeing with the entire area. The supported isThe area of columns of intercolumniations ToKether 1S29-7 13268-6 j 5098 7647 Chap. II. PRINCIPLES OF PROPORTION. 955 A line drawn through the centre of the pediment, another at half the height ofthe columns, and a third under the entablature, would divide the height into threeequal portions, proving that, in this example, the Romans made the part supported one-third of the whole, and divided the other two between the columns and their intercolumni-^tions. The shaft of eac
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