. An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth. parallelopipeds, prisms, cylinders, spheres, spheroids, the centre of gravity isin the middle of the right axis, because of the similarity and symmetry of their partsequally distant from that point. 1284. In pyramids and cones (Jiffs. 542, 543.), which diminish gradually from the baseto the apex, the centre of gravity is at the distance of one fourth of the axis ^ from the base. • ..•?/: 1285. In paraboloids, which diminishless on account of their c
. An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth. parallelopipeds, prisms, cylinders, spheres, spheroids, the centre of gravity isin the middle of the right axis, because of the similarity and symmetry of their partsequally distant from that point. 1284. In pyramids and cones (Jiffs. 542, 543.), which diminish gradually from the baseto the apex, the centre of gravity is at the distance of one fourth of the axis ^ from the base. • ..•?/: 1285. In paraboloids, which diminishless on account of their curvature, thecentre of gravity is at the height of onethird the axis above the base. To find the centre of a pyramid or ofa truncated cone (fffs. 542, 543.), wemust first multiply the cube of the entirecone or pyramid by the distance of itscentre of gravity from the vertex. from this product that of thepart M S11 which is cut off, by the dis-tance of its centre of gravity from theapex. 3. Divide this remainder by thecube of the truncated pyramid or cone ;the quotient will be the distance of thecone or pyramid from its Fig. 542. Fig. 513 centre of gravity G of the part of the truncated 34^5 THEORY OF ARCliriECTUUE. Hook II.
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