174

HISTORY OF ENGINEERING.

Book I.

Seven aqueducts were sufficient to supply Rome until the time of Caligula , when twoothers were commenced, which were finished by the emperor Claudius : these were —Aqua Claudia . — Few aqueducts exhibit greater beauty of construction or design, and

Fig. 199,

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Fig. 200. AQUA CLAUDIA AND ANIO NOVI’S.