The Ten Books on Architecture, 9.8.14

Vitruvius  translated by Joseph Gwilt

« Vitr. 9.8 | Vitr. 9.8 | Vitr. 10.0 | About This Work »

14Thus, going gradually through the points of Aquarius and Pisces, as soon as the hole of the small tympanum touches the eighth part of Aries, the water flows more gently, and produces the equinoctial hours. From Aries, through the spaces of Taurus and Gemini, advancing to the upper points where the Crab is placed, the hole or tympanum touching it at its eighth division, and arriving at the summit, the power is lessened; and hence running more slowly, its stay is lengthened, and the solstitial hours are thereby formed. When it descends from Cancer, and passes through Leo and Virgo, returning to the point of the eighth part of Libra, its stay is shortened by degrees, and the hours diminished, till, arriving at the same point of Libra, it again indicates the equinoctial hours.

« Vitr. 9.8 | Vitr. 9.8 | Vitr. 10.0 | About This Work »