« Vitr. 9.8 | Vitr. 9.8 | Vitr. 10.0 | About This Work »
10Hence, just as the sun during his passage through the constellations makes the days and hours longer or shorter, so the boss on a dial, moving from point to point in a direction contrary to that of the revolution of the drum in the middle, is carried day by day sometimes over wider and sometimes over narrower spaces, giving a representation of the hours and days within the limits of each month.
To manage the water so that it may flow regularly, we must proceed as follows.
« Vitr. 9.8 | Vitr. 9.8 | Vitr. 10.0 | About This Work »