The aqueducts, especially those which were mostly underground, it will be observed, made long detours, as compared with the direct line of road; as, for instance, in the first on the list, the distance by road was but eight Roman miles, but that by the channel of the aqueduct was eleven miles. The total length of all the channels of the aqueducts, constructed in less than four centuries, was upwards of 285.610 Roman miles, of which 242.697 miles were cut beneath the surface, and 42.918 miles carried on substructure, arched or not, as the case required, above the surface of the ground. | LENGTH OF CHANNEL.[152] Order as | Above Under DATE. No. to Level. NAME. | ground. ground. -----------+-------+--------+----------------+------------+------------- | | | | _m._ _p._ | _m._ _p._ B.C. 312 | I. | 8th | AQUA APPIA | 0 60 | 11 130 | | | | | ” 263 | II. | 6th | ANIO VETUS | 0 221 | 42 779 | | | | | ” 145 | III. | 5th | AQUA MARCIA | 7 463 | 54 247½ | | | | | ” 126 | IV. | 4th | ” TEPULA | 7 0 | 6 0 | | | | | ” 34 | V. | 3rd | ” JULIA | 7 0 | 8 426½ | | | | | ” 21 | VI. | 7th | ” VIRGO | 1 240 | 12 865 | | | | | ” _c._ 10 | VII. | 9th | ” ALSIETINA | 0 358 | 21 714 | | | | | ? in channel | | | | | A.D. 33 | VIII. | 2nd | ” CLAUDIA | 10 176 | 36 230 | | | | | ” 33 | IX. | 1st | ANIO NOVUS | 9 400 | 49 300 -----------+-------+--------+----------------+------------+------------- _Totals according to computation of Frontinus_ 42 918 242 692 ------------------------------------------------------------------------ Of the above, six are carried to Piscinæ on the Via Latina. { V. JULIA } The three { IV. TEPULA } carried from the same reservoir { III. MARCIA } on the same series of arches. The two { IX. Anio Novus } carried on higher arches, which end { VIII. Aqua Claudia } after the Pallantian gardens. The one II. Anio Vetus, has a reservoir on the Via Latina.—(_Fron._, c. 19.) SUPPLY.