‹‹‹ Vitr. 9.8.14 | Table of Contents | Vitr. 10.0.1 ›››
15The hole being lowered through the space of Scorpio and Sagittarius, in its revolution it returns to the eighth division of Capricornus, and, by the velocity of the water, the winter hours are produced. To the best of my ability I have explained the construction and proportions of dials, so that they may be easily set up. It now remains for me to speak of machines, and the principles which govern them. These will be found in the following book, and will complete this Treatise on Architecture.
15Finally, the opening comes down more rapidly through Scorpio and Sagittarius, and on its return from its revolution to the end of the first eighth of Capricornus, the velocity of the stream renews once more the short hours of the winter solstice.
The rules and forms of construction employed in designing dials have now been described as well as I could. It remains to give an account of machines and their principles. In order to make my treatise on architecture complete, I will begin to write on this subject in the following book.