‹ Ancient Sundials
Dialface ID 318
Abstract
The central shadow-receiving surface of this dial is a convex cylinder with eleven hour lines and three day curves. Ashby publishes a measured drawing by Andreas Coner which gives tw = 3 units, we = 5 1/8 units and es = 17 3/4 units. The central dial is flanked by two deviating vertical dials facing southeast and southwest. Each deviating dial has three day curves divided by five hour lines with a gnomon hole above the meridian. A calendar showing the longest day equal to fifteen hours (\phi=40.56) is engraved on the base below the dial faces.
Measurements
This object has not been measured by the 3D pipeline. Its entry in the catalogue rests on the published description only; no surface fit, latitude or line detection exists for it.
References
- – Gibbs, Sharon L., Greek and Roman Sundials, New Haven and London, 1976, p. 390.
- – Ashby, T., Sixteenth-Century Drawings of Roman Buildings attributed to Andreas Corner, 1904, p. 33, no. 48 and pl. 48 (drawing).
- – Boissard, Jean Jaques, Romanae urbis topographia & antiquitates, Frankfurt, 1597, pl. 140-142.
- – p. 638f., no. 2306.
- – Michaelis, Adolph Theodor Friedrich, Römische Skizzen nordischer Künstler des XVI. Jahrhunderts, 1891, p. 237, no. 187.