<Snip> For latitude +32 (isn't that your approximate latitude, John?), a horizontal dial's mean absolute error would be 6.8 minutes. <Snip>
But don't you also have to adjust that figure for the longitude correction ? I have always had concerns with the EofT when it does not take into account the distance from the standard meridian - to the uninitiated, the dial STILL doesn't give "clock" time, reinforcing their (incorrect) opinion that sundials don't work properly. If I include an EofT graph or table for a known location, I add (or subtract) the longitude correction. With a nice brass plaque, what is needed is for it to be in two parts, with a sliding y axis graduated in degrees West (or East) of the standard meridian. I'm sorry Tad, (I love the poem) but where I live "On September one, you CAN'T trust the sun" It's November 28 when it's straight And it's only "clock" time on two days of the year, not four. And what about Daylight Saving? Mike [EMAIL PROTECTED] 53.37N 3.02W Chester, UK
