Arthur,
>I spent many idle hour trying to come up with a sundial that would allow an >easy >mechanical correction for the equation of time. Let me then alert you to an article that is currently projected for the June issue of the Compendium: "Kratzer Layout, Yabashi Point & Sawyer Equant". The article will include a discussion of the standard time dial invented by Tokutaro Yabashi and a discussion of a general form of the Equant sundial I introduced in: "An Equant Sundial", Bulletin of the British Sundial Society, Jul 1991, 91(2):34. I will attach a copy of the latter article to a separate email to you. I think you will find the equant dial interesting for its ability to provide the correction you refer to. Fred Sawyer