Year 2006

Work of our members

Combination sundial

Horizontal, polar and equatorial

The stone sundial shown here is a combination of a horizontal and a polar sundial, with, for an encore, a small equatorial sundial on top.
The dial is quite small, and finds use as a tabletop or windowsill sundial.
The dial face of a polar sundial is parallel to the polar axis, and its hour lines are also parallel to each other.
On the horizontal and equatorial sundial, the hour lines converge.

In this model, the edge of the polar sundial is the pole style for the horizontal sundial.
Conversely, a point of the horizontal dial face is the index for the polar sundial.
This polar dial, then, is a point dial, and its dial face is provided with three date lines indicating the start of the four seasons.

Neither the horizontal nor the polar sundial is readable all day. The one is a morning, the other an afternoon dial.

The small equatorial sundial on top does need a proper pole style. It is a simple pin, the end protected with a small ball.