Note 94 — Chapter IV · PART I. THE AQUEDUCTS.

“Concipitur Virgo via Collatia ad milliarium octavum palustribus locis, signino circumjecto continendarum scaturiginum causâ.” Signinum is the particular kind of cement to hold water, always used to line the walls of the Aqueducts. It was not used after the time of the Empire, and the art of making it is said to be lost. It is the usual characteristic of the remains of an aqueduct.