A mean time polar sundial without curved hour lines is possible, if the user is permitted to adjust it for the EoT. It can show Summer Time / Daylight Saving Time, too.
The dial I propose is entirely fixed except for a circular dial plate that rotates about its centre. This is much easier to make than a polar mount. Like all polar dials, it is universal. I have taken the liberty of attaching a small (13KB) GIF file that shows the dial. It is a form of bifilar dial, though you would hardly guess that to look at it. Chris Lusby Taylor Newbury, Berks., England 51.4N, 1.3W Attachment converted: Macintosh HD:polar.gif 1 (GIFf/JVWR) (00067706)
