Jackson, Thomas Graham, Sir, 1835-1924 · Cambridge [Eng.] University press · leaf 64
IQJJINCH.Fig. 9. ^ Choisy, I/tsi. 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 constitutes p^ndentivethe triumph of Byzantine architecture. It is arrived atin this manner. A BCD (Fig. lo) is the… … Fig. lo. a larger dome FGHI circumscribed about the square.Then if the four segments ABG, BCH and the othertwo are cut off vertically on the lines AB, BC, etc. weget the imperfect dome shown by Fig. lo, No. 2. Thisis in fact the vault over the crossing of the cruciformmausoleum of Galla Placidia at…
