- Design and construction: Piers Nicholson, 2004
- Plinth donated by Acanthus Cast Stone Products
Spot-on dials create a clear and precise shadow whose outside edge indicates Solar time.
The markings indicate time in 5-minute segments. The slit through the gnomon produces a line of light across the dial at solar noon which indicates the direction of True North.
These features ensure that the sundial can be positioned and therefore read within a minute or two of accuracy.
Reading the dial
The time indicated by the outer edge of the shadow indicates Solar Time.
Where to find this sundial
The Horizontal Spot-on Sundial is number 6 on the map below.