The construction of Lombard and Gothic vaults (1911)
Porter, Arthur Kingsley, 1883-1933 · New Haven : Yale university press; [etc., etc.] · leaf 60
not distorted, their inner extrados beingloaded to bring them up to the level of the sloping vaults. The vaults areextraordinarily thin, being only six inches in thickness, and were doubtlessconstructed in this manner to make it possible to lay the slates of the roofdirectly upon them, as well as…
