Jackson, Thomas Graham, Sir, 1835-1924 · Cambridge : University Press · leaf 66
Fig. 9. 1 Choisy, Hist. dArchit. I. 125. CH. Ill] DOMES AND VAULTS 39 A far more scientific and beautiful way was by the Thespherical pendentive, the discovery of which, or at all pendemiveevents its use on a serious scale, constitutes the triumphof Byzantine architecture. It is arrived at in this… … the dome to be placed over it. Imagine a larger domeFGHI circumscribed about the square. Then if the foursegments ABG, BCH and the other two are cut offvertically on the lines AB, BC, etc. we get the imperfectdome shown by Fig. lo, No. 2. This is in fact the vaultover the crossing of the cruciform…
