Jackson, Thomas Graham, Sir, 1835-1924 · Cambridge [Eng.] University press · leaf 61
8 b), by laying the courses of bricksvertically instead of horizontally, so that the vault con-sisted of a series of rings or arches side by side, of whichthe joints and not the beds radiated from the centre.More than this, the rings were not exactly vertical, butinclined backwards, so that each… … Fig. 8. and so by being keyed became secure. It is in this waythat the granaries of Rameses II at Thebes are con-structed, and also the galleries at Khorsabad. The samemethod is adopted in the Palace of Ctesiphon, built byChosroes II about a.d. 550, where the enormous barrelvault of the central…
