1014

Estimates and preparatory studies for canals.

CANAL.

The canal which may be 16 braccia wide at the bottom and 20 at the top, we may say is on the average 18 braccia wide, and if it is 4 braccia deep, at 4 dinari the square braccia; it will only cost 900 ducats, to excavate by the mile, if the square braccio is calculated in ordinary braccia; but if the braccia are those used in measuring land, of which every 4 are equal to 4 1/2 and if by the mile we understand three thousand ordinary braccia; turned into land braccia, these 3000 braccia will lack 1/4; there remain 2250 braccia, which at 4 dinari the braccio will amount to 675 ducats a mile. At 3 dinari the square braccio, the mile will amount to 506 1/4 ducats so that the excavation of 30 miles of the canal will amount to 15187 1/2 ducats.

Taken from The Notebooks of Leonardo da Vinci edited by Jean Paul Richter, 1880.

Notebooks of Leonoardo da Vinci
XVII: Topographical Notes.
. . .
Canals in connection with the Arno.
1001,
1002,
1003,
1004,
1005,
1006,
1007,
1008
Canals in the Milanese.
1009,
1010,
1011,
1012,
1013
Estimates and preparatory studies for canals.
1014,
1015
Notes on buildings in Milan.
1016,
1017,
1018,
1019,
1020
Remarks on natural phenomena in and near Milan.
1021,
1022
Note on Pavia.
1023
Notes on the Sforzesca near Vigevano.
1024,
1025,
1026,
1027,
1028
Notes on the North Italian lake.
1029,
1030,
1031,
1032,
1033
Notes on places in Central Italy, visited in 1502.
1034
. . .